fix new bug introd, where after exif transpose I stupidly im to use im_orig always, instead of if its not a JPEG

shared.py

@@ -115,6 +115,7 @@ def GenThumb(fname):
         im_orig = Image.open(fname)
         if im_orig.format == 'JPEG':
             im = ImageOps.exif_transpose(im_orig)
+        else:
             im = im_orig
         if im.mode != "RGB":
             im = im.convert('RGB')