updated UA_Server_addExternalNamespace definition

removed namespace index definition, as it is managed by the server

include/ua_server_external_ns.h

@@ -86,7 +86,7 @@ typedef struct UA_ExternalNodeStore {
 } UA_ExternalNodeStore;
 
 UA_StatusCode UA_EXPORT
-UA_Server_addExternalNamespace(UA_Server *server, UA_UInt16 namespaceIndex, const UA_String *url,
+UA_Server_addExternalNamespace(UA_Server *server, const UA_String *url,
                                UA_ExternalNodeStore *nodeStore);
 
 #ifdef __cplusplus