QmlDesigner: Adding warning

Change-Id: I72fded3037ce912a5d01531c86da5a35c1996e3a
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp

@@ -1611,7 +1611,9 @@ void ModelValidator::variantValuesDiffer(VariantProperty &modelProperty, const Q
         QTC_ASSERT(modelProperty.dynamicTypeName() == dynamicTypeName, return);
     }
 
-    QTC_ASSERT(equals(modelProperty.value(), qmlVariantValue), return);
+
+
+    QTC_ASSERT(equals(modelProperty.value(), qmlVariantValue), qWarning() << modelProperty.value() << qmlVariantValue);
     QTC_ASSERT(0, return);
 }