Use C++ guarded alloc for FilterBase

source/gameengine/VideoTexture/FilterBase.h

@@ -116,6 +116,10 @@ protected:
 		// otherwise return converted pixel
 		return m_previous->m_filter->convert(src, x, y, size, pixSize);
 	}
+
+#ifdef WITH_CXX_GUARDEDALLOC
+	MEM_CXX_CLASS_ALLOC_FUNCS("GE:FilterBase")
+#endif
 };