Added try/catch around the removeObserver call.

It seems that sometimes the controller wasn't observing bounds. That's no big issue, but we can't have it crash the app because of that. ;)

Fixes ViewDeck#74.

Author: Inferis

ViewDeck/IIViewDeckController.m

@@ -589,7 +589,11 @@ - (void)viewWillDisappear:(BOOL)animated {
 - (void)viewDidDisappear:(BOOL)animated {
     [super viewDidDisappear:animated];
 
-    [self.view removeObserver:self forKeyPath:@"bounds"];
+    @try {
+        [self.view removeObserver:self forKeyPath:@"bounds"];
+    } @catch(id anException){
+        //do nothing, obviously it wasn't attached because an exception was thrown
+    }
 
     [self relayAppearanceMethod:^(UIViewController *controller) {
         [controller viewDidDisappear:animated];