update fullfn properly

Author: mcmonkey4eva

modules/images.py

@@ -577,6 +577,7 @@ def _atomically_save_image(image_to_save, filename_without_extension, extension)
         max_name_len = os.statvfs(path).f_namemax
         fullfn_without_extension = fullfn_without_extension[:max_name_len - max(4, len(extension))]
         params.filename = fullfn_without_extension + extension
+        fullfn = params.filename
     _atomically_save_image(image, fullfn_without_extension, extension)
 
     image.already_saved_as = fullfn