Crash when nil provided to .date variable.

[seriyvolk83]

2016-08-17 16:32:51.778 Let’s[9373:1157291] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010ed7dd85 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000011268edeb objc_exception_throw + 48
    2   CoreFoundation                      0x000000010ec36a52 -[__NSPlaceholderArray initWithObjects:count:] + 290
    3   CoreFoundation                      0x000000010ec930b4 +[NSArray arrayWithObjects:count:] + 52
    4   THCalendarDatePicker                0x0000000110a98823 -[THDatePickerViewController setDate:] + 115