fix possible crash

Author: Jari Kalinainen

UIImageCropper.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'UIImageCropper'
-  s.version          = '1.3.1'
+  s.version          = '1.3.2'
   s.summary          = 'Simple Image cropper for UIImage and UIImagePickerController with customisable aspect ratio.'
 
 # This description is used to generate tags and improve search results.

UIImageCropper/UIImageCropper.swift

@@ -297,6 +297,11 @@ public class UIImageCropper: UIViewController, UIImagePickerControllerDelegate,
         layoutDone = false
 
         self.image = image.fixOrientation()
-        picker.present(self, animated: true, completion: nil)
+        if var topController = UIApplication.shared.keyWindow?.rootViewController {
+            while let presentedViewController = topController.presentedViewController {
+                topController = presentedViewController
+            }
+            topController.present(self, animated: true, completion: nil)
+        }
     }
 }