Fix can not clear error message when set correct code
Fix can not clear error message when set correct code

akira-cn/thinkjs,Qihoo360/thinkjs,akira-cn/thinkjs,maxzhang/thinkjs,75team/thinkjs,maxzhang/thinkjs,75team/thinkjs,akira-cn/thinkjs,thinkjs/thinkjs,75team/thinkjs,snadn/thinkjs,maxzhang/thinkjs