fixed #354
fixed #352
Merge pull request #356 from htlxyz/hotfix/samples_browser_improve

fixed #354,fixed #352
modify invoke DrawNode:drawDot will cause stack over error
Merge pull request #357 from htlxyz/hotfix/samples_browser_improve

modify invoke DrawNode:drawDot will cause stack over error
Merge branch 'master' of https://github.com/chukong/quick-cocos2d-x
fix: #351
fix: #351