don't typecheck array dimensions if none defined in the type

src/server/ua_services_attribute.c

@@ -87,9 +87,16 @@ compatibleArrayDimensions(size_t constraintArrayDimensionsSize,
                           const UA_UInt32 *constraintArrayDimensions,
                           size_t testArrayDimensionsSize,
                           const UA_UInt32 *testArrayDimensions) {
+    /* No array dimensions defined -> everything is permitted if the value rank fits */
+    if(constraintArrayDimensionsSize == 0) {
+        return UA_STATUSCODE_GOOD;
+    }
+
+    /* Dimension count must match */
     if(testArrayDimensionsSize != constraintArrayDimensionsSize)
         return UA_STATUSCODE_BADTYPEMISMATCH;
-    /* dimension size zero in the constraint is a wildcard */
+
+    /* Dimension lengths must match; zero in the constraint is a wildcard */
     for(size_t i = 0; i < constraintArrayDimensionsSize; ++i) {
         if(constraintArrayDimensions[i] != testArrayDimensions[i] &&
            constraintArrayDimensions[i] != 0)