Merge pull request #642 from david-cermak/fix/mdns_coverity

[mdns]: Fix recent issues on v1.4 reported by Coverity

Author: david-cermak

components/mdns/mdns.c

@@ -5956,11 +5956,6 @@ static mdns_txt_item_t *_copy_mdns_txt_items(mdns_txt_linked_item_t *items, uint
     for (mdns_txt_linked_item_t *tmp = items; tmp != NULL; tmp = tmp->next) {
         ret_index++;
     }
-    if (ret_index == 0) {
-        *txt_count = 0;
-        *txt_value_len = NULL;
-        return NULL;
-    }
     *txt_count = ret_index;
     if (ret_index == 0) {   // handle empty TXT
         *txt_value_len = NULL;
@@ -6403,22 +6398,14 @@ esp_err_t mdns_service_remove_for_host(const char *instance, const char *service
             if (_mdns_service_match(a->service, service, proto, hostname)) {
                 if (_mdns_server->services != a) {
                     b->next = a->next;
-                    _mdns_send_bye(&a, 1, false);
-                    _mdns_remove_scheduled_service_packets(a->service);
-                    _mdns_free_service(a->service);
-                    free(a);
-                    a = b->next;
-                    continue;
                 } else {
                     _mdns_server->services = a->next;
-                    _mdns_send_bye(&a, 1, false);
-                    _mdns_remove_scheduled_service_packets(a->service);
-                    _mdns_free_service(a->service);
-                    free(a);
-                    a = _mdns_server->services;
-                    b = a;
-                    continue;
                 }
+                _mdns_send_bye(&a, 1, false);
+                _mdns_remove_scheduled_service_packets(a->service);
+                _mdns_free_service(a->service);
+                free(a);
+                break;
             }
             b = a;
             a = a->next;