Fix bad image offset
Fix bad image offset

WenchaoD/FSCalendar,f33chobits/FSCalendar,mohsinalimat/FSCalendar,f33chobits/FSCalendar,WenchaoIOS/FSCalendar,tilltue/FSCalendar,mohsinalimat/FSCalendar,mohsinalimat/FSCalendar,tilltue/FSCalendar,mohsinalimat/FSCalendar,WenchaoD/FSCalendar,WenchaoIOS/FSCalendar