Steve: fix warning UILayout

Author: stevetranby

cocos/ui/UILayout.cpp

@@ -1934,7 +1934,7 @@ void Layout::setCameraMask(unsigned short mask, bool applyChildren)
                 rect[1].set(_contentSize.width, 0.0f);
                 rect[2].set(_contentSize.width, _contentSize.height);
                 rect[3].set(0.0f, _contentSize.height);
-                Color4F green(0.0f, 1.0f, 0.0f, 1.0f);
+                //STEVE: Color4F green(0.0f, 1.0f, 0.0f, 1.0f);
                 _clippingStencil->clear();
                 _clippingStencil->drawPolygon(rect, 4, green, 0, green);
             } else {