Make real use of bitfield

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2358 dfc29bdd-3216-0410-991c-e03cc46cb475

include/SSkinMeshBuffer.h

@@ -384,11 +384,12 @@ struct SSkinMeshBuffer : public IMeshBuffer
 	video::SMaterial Material;
 	video::E_VERTEX_TYPE VertexType;
 
+	core::aabbox3d<f32> BoundingBox;
+
 	// hardware mapping hint
-	E_HARDWARE_MAPPING MappingHint_Vertex;
-	E_HARDWARE_MAPPING MappingHint_Index;
+	E_HARDWARE_MAPPING MappingHint_Vertex:3;
+	E_HARDWARE_MAPPING MappingHint_Index:3;
 
-	core::aabbox3d<f32> BoundingBox;
 	bool BoundingBoxNeedsRecalculated:1;
 };