Added setNeedsOffsetAdjustment to IIViewDeckView.

Author: Inferis

ViewDeck/IIViewDeckController.m

@@ -149,10 +149,14 @@ static NSTimeInterval durationToAnimate(CGFloat pointsToAnimate, CGFloat velocit
 
 @interface IIViewDeckView : UIView {
     BOOL _userInteractionEnabled;
+    BOOL _needsOffsetAdjustment;
 }
 
 @property (nonatomic, assign) BOOL allowUserInteractionEnabled;
 
+- (void)setNeedsOffsetAdjustment;
+- (BOOL)needsOffsetAdjustment;
+
 @end
 
 @interface UIViewController (UIViewDeckController_ViewContainmentEmulation_Fakes)
@@ -3375,6 +3379,14 @@ - (void)setUserInteractionEnabled:(BOOL)userInteractionEnabled {
     [super setUserInteractionEnabled:_allowUserInteractionEnabled && _userInteractionEnabled];
 }
 
+- (void)setNeedsOffsetAdjustment {
+    _needsOffsetAdjustment = YES;
+}
+
+- (BOOL)needsOffsetAdjustment {
+    return _needsOffsetAdjustment;
+}
+
 @end
 
 @implementation UIViewController (UIViewDeckItem)