Suppress 400 GCC warnings in Collada DOM headers

indra/llprimitive/llmodel.cpp

@@ -35,10 +35,13 @@
 #pragma warning (disable : 4263)
 #pragma warning (disable : 4264)
 #endif
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Woverloaded-virtual"
 #include "dae.h"
 #include "dae/daeErrorHandler.h"
 #include "dom/domConstants.h"
 #include "dom/domMesh.h"
+#pragma GCC diagnostic pop
 #if LL_MSVC
 #pragma warning (default : 4263)
 #pragma warning (default : 4264)