BUGFIX: Fix newer Xcode/clang warnings

Author: weissi

FRLayeredNavigationController/FRLayeredNavigationController.m

@@ -543,7 +543,7 @@ + (CGRect)getScreenBoundsForOrientation:(UIInterfaceOrientation)orientation
 
     if (UIInterfaceOrientationIsLandscape(orientation))
     {
-        CGRect temp;
+        CGRect temp = CGRectMake(0, 0, 0, 0);
         temp.size.width = fullScreenRect.size.height;
         temp.size.height = fullScreenRect.size.width;
         fullScreenRect = temp;
@@ -647,7 +647,7 @@ - (void)popViewControllerAnimated:(BOOL)animated
     if (animated) {
         [UIView animateWithDuration:0.5
                               delay:0
-                            options: UIViewAnimationCurveLinear
+                            options: UIViewAnimationOptionCurveLinear
                          animations:^{
                              vc.view.frame = goAwayFrame;
                          }
@@ -771,7 +771,7 @@ - (void)pushViewController:(UIViewController *)contentViewController
     if(animated) {
         [UIView animateWithDuration:0.5
                               delay:0
-                            options: UIViewAnimationCurveEaseOut
+                            options: UIViewAnimationOptionCurveEaseOut
                          animations:^{
                              doNewFrameMove();
                          }

FRLayeredNavigationController/Utils.h

@@ -33,7 +33,7 @@
 BOOL CGFloatEquals(CGFloat l, CGFloat r);
 BOOL CGFloatNotEqual(CGFloat l, CGFloat r);
 
-@interface Utils
+@interface Utils : NSObject
 
 + (UIImage *)transparentImage;