fix: avoid rescaling horizontal images

ImageViewer/ViewController.swift

@@ -1637,11 +1637,13 @@ class ImageLoader {
 
             if token.isCancelled { finish(nil); return }
 
-            guard var image = UIImage(data: extractedData) else {
+            guard let image = UIImage(data: extractedData) else {
                 finish(nil)
                 return
             }
 
+            var finalImage: UIImage!
+
             if token.isCancelled { finish(nil); return }
 
             // If you turn pages fast, completion will not be nil and as such only the needed scaled image should be prepared
@@ -1661,7 +1663,7 @@ class ImageLoader {
                     print("this should be unreachable")
                     return
                 }
-                if rotation == .vertical { image = vScaleImage }
+                if rotation == .vertical { finalImage = vScaleImage }
             }
 
             if token.isCancelled { finish(nil); return }
@@ -1682,10 +1684,10 @@ class ImageLoader {
                     print("this should be unreachable")
                     return
                 }
-                if rotation == .horizontal { image = hScaleImage }
+                if rotation == .horizontal { finalImage = hScaleImage }
             }
 
-            finish(image)
+            finish(finalImage)
         }
     }