NewLabel memory leak fix.
unsigned short int * -> unsigned short* , remove unneeded `int`.
unsigned short int * -> unsigned short* , remove unneeded `int`.
A compilation error fix in lua_cocos2dx_manual.cpp.
Merge pull request #5244 from dumganhar/memory-leak-new-label

closed #3862: [New Label] Memory leak in FontFreeType::createFontAtlas()
Update CHANGELOG [ci skip]
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developBug