lmdbbackend: Prevent a useless copy in LMDBBackend::getAllDomainsFiltered()

Reported by Coverity as 1510936: AUTO_CAUSES_COPY.

diff --git a/modules/lmdbbackend/lmdbbackend.cc b/modules/lmdbbackend/lmdbbackend.cc
index d47904815d52035b4153f0fc2542cde0502ad3bd..11168f326677286c845a9c1df00daaea830f8377 100644 (file)
--- a/modules/lmdbbackend/lmdbbackend.cc
+++ b/modules/lmdbbackend/lmdbbackend.cc
@@ -1722,9 +1722,9 @@ void LMDBBackend::getAllDomainsFiltered(vector<DomainInfo>* domains, const std::
       zonemap[di.zone] = di;
     }
 
-    for (auto [k, v] : zonemap) {
+    for (auto& [k, v] : zonemap) {
       if (allow(v)) {
-        domains->push_back(v);
+        domains->push_back(std::move(v));
       }
     }
   }