Fix 2 issues with new-line.
Fix 2 issues with new-line.

— Apply patch from @glazedkoala. Fix the issue where Label is reused
with new-string being smaller than previous one. With fix character is
not displaced any more.

— _width logic was broken for long time. If CCLabelBMFont is created
with some width say N, then expectation is to see new-line once string
is out-of bound.
     This effect is more visible where user is updating label
dynamically (like appending single character)

yaoxiaoyong/cocos2d-objc,yaoxiaoyong/cocos2d-objc,dnessorga/cocos2d-objc,savysoda/cocos2d-objc,codepython/cocos2d-objc,oxeron/cocos2d-objc,yaoxiaoyong/cocos2d-objc,cogddo/cocos2d-objc,savysoda/cocos2d-objc,yaoxiaoyong/cocos2d-objc,nader-eloshaiker/cocos2d-objc,cocos2d/cocos2d-objc,DNESS/cocos2d-objc,knight2010/cocos2d-objc,tambarskjelve/cocos2d-objc,seem-sky/cocos2d-swift,codepython/cocos2d-objc,lpeancovschi/cocos2d-objc,knight2010/cocos2d-objc,finthamoussu/cocos2d-objc,zaneLou/cocos2d-objc,dnessorga/cocos2d-objc,dnessorga/cocos2d-objc,tambarskjelve/cocos2d-objc,liduanw/cocos2d-objc,liduanw/cocos2d-objc,codepython/cocos2d-objc,finthamoussu/cocos2d-objc,lpeancovschi/cocos2d-objc,SuPair/cocos2d-objc,cocos2d/cocos2d-objc,TukekeSoft/cocos2d-spritebuilder,tambarskjelve/cocos2d-objc,cogddo/cocos2d-objc,nader-eloshaiker/cocos2d-objc,SuPair/cocos2d-objc,seem-sky/cocos2d-swift,nader-eloshaiker/cocos2d-objc,finthamoussu/cocos2d-objc,liduanw/cocos2d-objc,cogddo/cocos2d-objc,seem-sky/cocos2d-swift,savysoda/cocos2d-objc,dnessorga/cocos2d-objc,seem-sky/cocos2d-swift,finthamoussu/cocos2d-objc,SuPair/cocos2d-objc,knight2010/cocos2d-objc,DNESS/cocos2d-objc,lpeancovschi/cocos2d-objc,zaneLou/cocos2d-objc,oxeron/cocos2d-objc,liduanw/cocos2d-objc,SuPair/cocos2d-objc,dnessorga/cocos2d-objc,TukekeSoft/cocos2d-spritebuilder,cogddo/cocos2d-objc,savysoda/cocos2d-objc,DNESS/cocos2d-objc,yaoxiaoyong/cocos2d-objc,nader-eloshaiker/cocos2d-objc,tambarskjelve/cocos2d-objc,DNESS/cocos2d-objc,zaneLou/cocos2d-objc,knight2010/cocos2d-objc,codepython/cocos2d-objc,TukekeSoft/cocos2d-spritebuilder,liduanw/cocos2d-objc,DNESS/cocos2d-objc,zaneLou/cocos2d-objc,SuPair/cocos2d-objc,tambarskjelve/cocos2d-objc,TukekeSoft/cocos2d-spritebuilder,lpeancovschi/cocos2d-objc