fix#462: default cropper cropped result is not returnned

Author: glyh

javsp/cropper/interface.py

@@ -21,5 +21,4 @@ def crop_specific(self, fanart: Image, ratio: float) -> Image:
 
         dh = int((fanart_h - poster_h) / 2)
         box = (fanart_w - poster_w, dh, fanart_w, poster_h + dh)
-        fanart.crop(box)
-        return fanart
+        return fanart.crop(box)