a bug fix for --no-filenames option to work! (for images)

i was trying to '-nf' option, then image captions were not consistent! i.e. they were still there with '-nf' option. so investigated.

distribusi/distribusi.py

@@ -166,6 +166,7 @@ def distribusify(args, directory):  # noqa
                                 a = thumbnail(full_path, name, args)
                             if args.no_filenames:
                                 caption = ""
+                                a = FILE_TYPES[type_].format(name, caption)
                             if args.captions:
                                 caption = caption(full_path)
                                 a = FILE_TYPES[type_].format(name, caption)