MAINT-710: Fix for VertexBufferStrider could not find valid vertex data. (from Firestorm)

indra/newview/llface.cpp

@@ -1838,7 +1838,7 @@ BOOL LLFace::getGeometryVolume(const LLVolume& volume,
 		}
 	}
 
-	if (rebuild_color)
+	if (rebuild_color && mVertexBuffer->hasDataType(LLVertexBuffer::TYPE_COLOR) )
 	{
 		LLFastTimer t(FTM_FACE_GEOM_COLOR);
 		mVertexBuffer->getColorStrider(colors, mGeomIndex, mGeomCount, map_range);