Disable Segement should add check selectedSegmentIndex

[xrksudy]

When I run SDSegmentedControl Demo, I try click Disable Segement Button, At last, The app will crash. I found this code don't check selectedSegmentIndex.

• (void)setEnabled:(BOOL)enabled forSegmentAtIndex:(NSUInteger)index
  {
  [self segmentAtIndex:index].enabled = enabled;

  if (index == self.selectedSegmentIndex)
  {
  self.selectedSegmentIndex = [self firstEnabledSegmentIndexNearIndex:index];
  }
  }

The Demo App Crash Log is:

2013-11-11 23:11:46.110 Example[70636:70b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: index >= 0 && index < self._items.count'
*** First throw call stack:
(
0 CoreFoundation 0x01b195e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x017088b6 objc_exception_throw + 44
2 CoreFoundation 0x01b19448 +[NSException raise:format:arguments:] + 136
3 Foundation 0x010dbfee -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
4 Example 0x0000745b -[SDSegmentedControl segmentAtIndex:] + 363
5 Example 0x00006305 -[SDSegmentedControl setEnabled:forSegmentAtIndex:] + 69
6 Example 0x000033af -[ViewController disableSegment:] + 191
7 libobjc.A.dylib 0x0171a874 -[NSObject performSelector:withObject:withObject:] + 77
8 UIKit 0x0026b0c2 -[UIApplication sendAction:to:from:forEvent:] + 108
9 UIKit 0x0026b04e -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
10 UIKit 0x003630c1 -[UIControl sendAction:to:forEvent:] + 66
11 UIKit 0x00363484 -[UIControl _sendActionsForEvents:withEvent:] + 577
12 UIKit 0x00362733 -[UIControl touchesEnded:withEvent:] + 641
13 UIKit 0x002a851d -[UIWindow _sendTouchesForEvent:] + 852
14 UIKit 0x002a9184 -[UIWindow sendEvent:] + 1232
15 UIKit 0x0027ce86 -[UIApplication sendEvent:] + 242
16 UIKit 0x0026718f _UIApplicationHandleEventQueue + 11421
17 CoreFoundation 0x01aa283f CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 15
18 CoreFoundation 0x01aa21cb __CFRunLoopDoSources0 + 235
19 CoreFoundation 0x01abf29e __CFRunLoopRun + 910
20 CoreFoundation 0x01abeac3 CFRunLoopRunSpecific + 467
21 CoreFoundation 0x01abe8db CFRunLoopRunInMode + 123
22 GraphicsServices 0x031689e2 GSEventRunModal + 192
23 GraphicsServices 0x03168809 GSEventRun + 104
24 UIKit 0x00269d3b UIApplicationMain + 1225
25 Example 0x000022cd main + 141
26 Example 0x00002235 start + 53
)
libc++abi.dylib: terminating with uncaught exception of type NSException