cocos2d-x 编译错误(关于CCBReader)

编译的时候console提示:C:UsersmilyDesktopcocos2d-2.0-rc2-x-2.0.1/cocos2dx/extensions/CCBReader/CCBReader.cpp:139:52: warning: multi-character character constant -Wmultichar]

有前辈知道怎么解决吗?谢谢