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>
diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index b94a971..0ac922a 100644
--- a/fs/squashfs/sqfs.c
+++ b/fs/squashfs/sqfs.c
@@ -1573,4 +1573,5 @@
 	free(sqfs_dirs->inode_table);
 	free(sqfs_dirs->dir_table);
 	free(sqfs_dirs->dir_header);
+	free(sqfs_dirs);
 }