ovs-router: Fix JSON object leak in ovs/router/rule/show command.

There is a memory leak when listing router rules in JSON format when a
rule doesn't match the requested address family.

Coverity report:
    CID 556928:         Resource leaks  (RESOURCE_LEAK)
    Variable "entry" going out of scope leaks the storage it points to.

Fixes: 5c30756 ("ovs-router: Introduce ovs/route/rule/show command.")
Signed-off-by: Dima Chumak <[email protected]>
Signed-off-by: Ilya Maximets <[email protected]>

Author: chumakd

lib/ovs-router.c

@@ -855,11 +855,12 @@ ovs_router_rules_show_json(struct json *rule_entries, bool ipv6)
     struct ds ds;
 
     PVECTOR_FOR_EACH (rule, &rules) {
-        struct json *entry = json_object_create();
+        struct json *entry;
 
         if (rule->ipv4 == ipv6) {
             continue;
         }
+        entry = json_object_create();
 
         json_object_put(entry, "priority", json_integer_create(rule->prio));
         json_object_put(entry, "user", json_integer_create(rule->user));