fs/squashfs: sqfs_get_abs_path: fix error check

the return value of sqfs_tokenize(rel_tokens, rc, rel); wasn't checked.
(but "ret" value was !)
This is obviouly a typo.
Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>

fs/squashfs/sqfs.c

@@ -359,7 +359,7 @@ static char *sqfs_get_abs_path(const char *base, const char *rel)
 	if (ret)
 		goto free_r_tokens;
 
-	sqfs_tokenize(rel_tokens, rc, rel);
+	ret = sqfs_tokenize(rel_tokens, rc, rel);
 	if (ret)
 		goto free_r_tokens;