linkhash.c: optimised the table_free path

linkhash.c

@@ -562,10 +562,9 @@ int lh_table_resize(struct lh_table *t, int new_size)
 void lh_table_free(struct lh_table *t)
 {
 	struct lh_entry *c;
-	for(c = t->head; c != NULL; c = c->next) {
-		if(t->free_fn) {
+	if(t->free_fn) {
+		for(c = t->head; c != NULL; c = c->next)
 			t->free_fn(c);
-		}
 	}
 	free(t->table);
 	free(t);