Fix assert in '- setSelectedSegmentIndex:' when a negative parameter is given (e.g., UISegmentedControlNoSegment)
Fix assert in '- setSelectedSegmentIndex:' when a negative parameter is given (e.g., UISegmentedControlNoSegment)

zuojx1013/SDSegmentedControl,winkapp/SDSegmentedControl,rs/SDSegmentedControl,derpoliuk/SDSegmentedControl,bhumi19/Hello1