fixing some 64 bit compiler warnings
fixing some 64 bit compiler warnings

Signed-off-by: Ondrej Rafaj <c000342b2accbba7a64cc43a1f54da40493a7d57@fuerteint.com>

qiaoxueshi/FTCoreText,FuerteInternational/FTCoreText,Ridiculous-Innovations/FTCoreText,zhang-yawei/FTCoreText,rain1988/FTCoreText,sujeking/FTCoreText