Update integer to string conversion functions for different data types.

- Changed formatting from %d to %ld for int32_t.
- Changed formatting from %u to %lu for uint32_t.

alternatively use the PRI Macros there.

tinyxml2.cpp

@@ -565,13 +565,13 @@ const char* XMLUtil::GetCharacterRef( const char* p, char* value, int* length )
 
 void XMLUtil::ToStr( int32_t v, char* buffer, int bufferSize )
 {
-    TIXML_SNPRINTF( buffer, bufferSize, "%d", v );
+    TIXML_SNPRINTF( buffer, bufferSize, "%ld", v );
 }
 
 
 void XMLUtil::ToStr( uint32_t v, char* buffer, int bufferSize )
 {
-    TIXML_SNPRINTF( buffer, bufferSize, "%u", v );
+    TIXML_SNPRINTF( buffer, bufferSize, "%lu", v );
 }