Fix Director#stopAnimation() not working in some browsers
Fix Director#stopAnimation() not working in some browsers

ryanwilliams/cocos2d-javascript,synaptek/cocos2d-javascript,ryanwilliams/cocos2d-javascript,ryanwilliams/cocos2d-javascript,synaptek/cocos2d-javascript,synaptek/cocos2d-javascript,synaptek/cocos2d-javascript,ryanwilliams/cocos2d-javascript,synaptek/cocos2d-javascript,ryanwilliams/cocos2d-javascript