Avoid looking up an entry twice by using a ref.

(cherry picked from commit 3eba27418a7102a82777b74bd199943b67a93a6e)

diff --git a/pdns/syncres.hh b/pdns/syncres.hh
index aa26649abc5ffaa863a27301df69928097e1d22b..4ead6cb18ef00387197d1120313680c48c99fa31 100644 (file)
--- a/pdns/syncres.hh
+++ b/pdns/syncres.hh
@@ -237,8 +237,9 @@ public:
     typename cont_t::iterator i = d_cont.find(t);
 
     if (i == d_cont.end()) {
-      d_cont[t].value = 1;
-      d_cont[t].last = now.tv_sec;
+      auto &r = d_cont[t];
+      r.value = 1;
+      r.last = now.tv_sec;
       return 1;
     }
     else {