Fixes detect size if crop whitespace

resize.py

@@ -22,8 +22,14 @@ try:
     im = im.convert()
     if args.width is not None or args.height is not None:
         if args.width is None:
+            if args.crop and args.crop == CROP_WHITESPACE:
+                size = (int(im.size[0]), args.height)
+            else:
                 size = (int(im.size[0] * args.height / im.size[1]), args.height)
         elif args.height is None:
+            if args.crop and args.crop == CROP_WHITESPACE:
+                size = (args.width, int(im.size[1]))
+            else:
                 size = (args.width, int(im.size[1] * args.width / im.size[0]))
         else:
             size = (args.width, args.height)