Merge pull request 'Fix memory leak' (#613) from inz/snac2:fix/actor_alt_leak into master

Reviewed-on: https://codeberg.org/grunfink/snac2/pulls/613

data.c

@@ -217,6 +217,7 @@ void user_free(snac *snac)
     xs_free(snac->key);
     xs_free(snac->links);
     xs_free(snac->actor);
+    xs_free(snac->actor_alt);
     xs_free(snac->md5);
 }