files-reg: don't leak file_remap objects on error paths

CID undefined (#1 of 1): Resource leak (RESOURCE_LEAK)
10. leaked_storage: Variable rm going out of scope leaks the storage it points to.
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

files-reg.c

@@ -264,6 +264,7 @@ static int open_remap_linked(struct reg_file_info *rfi,
 		rfd = mntns_get_root_by_mnt_id(rfi->rfe->mnt_id);
 		if (fstatat(rfd, rrfi->path, &st, AT_SYMLINK_NOFOLLOW)) {
 			pr_perror("Can't get owner of link remap %s", rrfi->path);
+			xfree(rm);
 			return -1;
 		}