fs/squashfs: sqfs_closedir: fix memory leak

sqfs_dirs wasn't freed anywhere.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>

fs/squashfs/sqfs.c

@@ -1573,4 +1573,5 @@ void sqfs_closedir(struct fs_dir_stream *dirs)
 	free(sqfs_dirs->inode_table);
 	free(sqfs_dirs->dir_table);
 	free(sqfs_dirs->dir_header);
+	free(sqfs_dirs);
 }