Fix naming of internal method

Author: enriquez

ECSlidingViewController/ECSlidingViewController.m

@@ -49,7 +49,7 @@ @interface ECSlidingViewController()
 - (void)setup;
 
 - (CGRect)topViewCalculatedFrameForPosition:(ECSlidingViewControllerTopViewPosition)position;
-- (CGRect)underLeftViewCalculatedFrameForTopViewPosition:(ECSlidingViewControllerTopViewPosition)position;
+- (CGRect)underLeftViewCalculatedFrameTopViewPosition:(ECSlidingViewControllerTopViewPosition)position;
 - (CGRect)underRightViewCalculatedFrameTopViewPosition:(ECSlidingViewControllerTopViewPosition)position;
 - (CGRect)frameFromDelegateForViewController:(UIViewController *)viewController
                              topViewPosition:(ECSlidingViewControllerTopViewPosition)topViewPosition;