Avoid accessing address 0x01

E.g. the address sanitizer of clang still tries to access it and thus
it yields an error.

src/ua_securechannel.h

@@ -102,7 +102,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_TRACE_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_TRACE_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_TRACE_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #define UA_LOG_DEBUG_CHANNEL_INTERNAL(LOGGER, CHANNEL, MSG, ...)              \
     UA_LOG_DEBUG(LOGGER, UA_LOGCATEGORY_SECURECHANNEL,                        \
@@ -111,7 +111,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_DEBUG_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_DEBUG_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_DEBUG_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #define UA_LOG_INFO_CHANNEL_INTERNAL(LOGGER, CHANNEL, MSG, ...)               \
     UA_LOG_INFO(LOGGER, UA_LOGCATEGORY_SECURECHANNEL,                         \
@@ -120,7 +120,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_INFO_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_INFO_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_INFO_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #define UA_LOG_WARNING_CHANNEL_INTERNAL(LOGGER, CHANNEL, MSG, ...)            \
     UA_LOG_WARNING(LOGGER, UA_LOGCATEGORY_SECURECHANNEL,                      \
@@ -129,7 +129,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_WARNING_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_WARNING_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_WARNING_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #define UA_LOG_ERROR_CHANNEL_INTERNAL(LOGGER, CHANNEL, MSG, ...)              \
     UA_LOG_ERROR(LOGGER, UA_LOGCATEGORY_SECURECHANNEL,                        \
@@ -138,7 +138,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_ERROR_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_ERROR_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_ERROR_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #define UA_LOG_FATAL_CHANNEL_INTERNAL(LOGGER, CHANNEL, MSG, ...)              \
     UA_LOG_FATAL(LOGGER, UA_LOGCATEGORY_SECURECHANNEL,                        \
@@ -147,7 +147,7 @@ UA_SecureChannel_processChunks(UA_SecureChannel *channel, const UA_ByteString *c
                  (CHANNEL)->securityToken.channelId, __VA_ARGS__)
 
 #define UA_LOG_FATAL_CHANNEL(LOGGER, CHANNEL, ...)        \
-    UA_MACRO_EXPAND(UA_LOG_FATAL_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_FATAL_CHANNEL_INTERNAL(LOGGER, CHANNEL, __VA_ARGS__, ""))
 
 #ifdef __cplusplus
 } // extern "C"

src/ua_session.h

@@ -100,7 +100,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_TRACE_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_TRACE_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_TRACE_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #define UA_LOG_DEBUG_SESSION_INTERNAL(LOGGER, SESSION, MSG, ...)        \
     UA_LOG_DEBUG(LOGGER, UA_LOGCATEGORY_SESSION,                        \
@@ -110,7 +110,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_DEBUG_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_DEBUG_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_DEBUG_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #define UA_LOG_INFO_SESSION_INTERNAL(LOGGER, SESSION, MSG, ...)        \
     UA_LOG_INFO(LOGGER, UA_LOGCATEGORY_SESSION,                        \
@@ -120,7 +120,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_INFO_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_INFO_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_INFO_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #define UA_LOG_WARNING_SESSION_INTERNAL(LOGGER, SESSION, MSG, ...)        \
     UA_LOG_WARNING(LOGGER, UA_LOGCATEGORY_SESSION,                        \
@@ -130,7 +130,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_WARNING_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_WARNING_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_WARNING_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #define UA_LOG_ERROR_SESSION_INTERNAL(LOGGER, SESSION, MSG, ...)        \
     UA_LOG_ERROR(LOGGER, UA_LOGCATEGORY_SESSION,                        \
@@ -140,7 +140,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_ERROR_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_ERROR_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_ERROR_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #define UA_LOG_FATAL_SESSION_INTERNAL(LOGGER, SESSION, MSG, ...)        \
     UA_LOG_FATAL(LOGGER, UA_LOGCATEGORY_SESSION,                        \
@@ -150,7 +150,7 @@ UA_Session_getUniqueSubscriptionID(UA_Session *session);
                  UA_PRINTF_GUID_DATA((SESSION)->sessionId.identifier.guid), __VA_ARGS__)
 
 #define UA_LOG_FATAL_SESSION(LOGGER, SESSION, ...)                      \
-    UA_MACRO_EXPAND(UA_LOG_FATAL_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, (const char*)0x01))
+    UA_MACRO_EXPAND(UA_LOG_FATAL_SESSION_INTERNAL(LOGGER, SESSION, __VA_ARGS__, ""))
 
 #ifdef __cplusplus
 } // extern "C"