squashfs: add missing buffer free

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 07ceeb8..48b6f4a 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -354,6 +354,7 @@
 		kfree(sbi->id_table);
 		kfree(sbi->fragment_index);
 		kfree(sbi->meta_index);
+		kfree(sbi->inode_lookup_table);
 		kfree(sb->s_fs_info);
 		sb->s_fs_info = NULL;
 	}