fixup! job-list: support constraint -> sql conversion

Author: chu11

src/modules/job-list/constraint_sql.c

@@ -325,10 +325,10 @@ int constraint2sql (json_t *constraint, char **query, flux_error_t *errp)
     }
     if (q) {
         if (asprintf (&rv, "(%s)", q) < 0) {
-            free (q);
             errno = ENOMEM;
             goto error;
         }
+        free (q);
     }
     (*query) = rv;
     return 0;