fix LayoutConstraints warning

[HuuLiang]

[LayoutConstraints] Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) ( "<NSAutoresizingMaskLayoutConstraint:0x6000009f0b90 h=--& v=--& EmptyDataSet_Swift.EmptyDataSetView:0x7fb5aa00e600.width == 0 (active)>", "<NSLayoutConstraint:0x6000009f0320 UIView:0x7fb5aa077fb0.centerX == EmptyDataSet_Swift.EmptyDataSetView:0x7fb5aa00e600.centerX (active)>", "<NSLayoutConstraint:0x6000009f0370 H:|-(0)-[UIView:0x7fb5aa077fb0] (active, names: '|':EmptyDataSet_Swift.EmptyDataSetView:0x7fb5aa00e600 )>", "<NSLayoutConstraint:0x6000009f0640 H:|-(26)-[empty set title] (active, names: empty set title:0x7fb5aa01c200, '|':UIView:0x7fb5aa077fb0 )>", "<NSLayoutConstraint:0x6000009f0730 H:[empty set title]-(26)-| (active, names: empty set title:0x7fb5aa01c200, '|':UIView:0x7fb5aa077fb0 )>" )

Will attempt to recover by breaking constraint <NSLayoutConstraint:0x6000009f0730 H:[empty set title]-(26)-| (active, names: empty set title:0x7fb5aa01c200, '|':UIView:0x7fb5aa077fb0 )>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger. The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.