Fix a storyboard warning
Fix a storyboard warning

Fix a storyboard warning

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