Call scroll completion block when scroll cancelled in more cases

Author: cbpowell

Sources/MarqueeLabel.swift

@@ -834,12 +834,21 @@ open class MarqueeLabel: UILabel, CAAnimationDelegate {
     }
 
     private func returnLabelToHome() {
+        // Store if label is away from home at time of call
+        let away = awayFromHome
+        
         // Remove any gradient animation
         maskLayer?.removeAllAnimations()
 
         // Remove all sublabel position animations
         sublabel.layer.removeAllAnimations()
 
+        // Fire completion block if appropriate
+        if away {
+            // If label was away when this was called, animation did NOT finish
+            scrollCompletionBlock?(!away)
+        }
+        
         // Remove completion block
         scrollCompletionBlock = nil
     }