fixes BOOL adjust which was never NO

[controller
performSelector:@selector(automaticallyAdjustsScrollViewInsets)
withObject:nil] returns id, which cast as BOOL is always YES if not nil.

it can just call the method directly since the the minimum SDK is iOS 7
now. There is no need anymore for respondsToSelector: conditions.

SWRevealViewController/SWRevealViewController.m

@@ -1384,9 +1384,8 @@ - (void)_setFrontViewPosition:(FrontViewPosition)newPosition withDuration:(NSTim
     void (^animations)() = ^()
     {
         // Calling this in the animation block causes the status bar to appear/dissapear in sync with our own animation
-        if ( [self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)])
-            [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate) withObject:nil];
-
+        [self setNeedsStatusBarAppearanceUpdate];
+
         // We call the layoutSubviews method on the contentView view and send a delegate, which will
         // occur inside of an animation block if any animated transition is being performed
         [_contentView layoutSubviews];
@@ -1586,9 +1585,9 @@ - (void)_performTransitionOperation:(SWRevealControllerOperation)operation withV
     controllerView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
     controllerView.frame = frame;
 
-    if ( [controller respondsToSelector:@selector(automaticallyAdjustsScrollViewInsets)] && [controllerView isKindOfClass:[UIScrollView class]] )
+    if ( [controllerView isKindOfClass:[UIScrollView class]] )
     {
-        BOOL adjust = (BOOL)[controller performSelector:@selector(automaticallyAdjustsScrollViewInsets) withObject:nil];
+        BOOL adjust = controller.automaticallyAdjustsScrollViewInsets;
 
         if ( adjust )
         {