[2207] minor style cleanup: constify

diff --git a/src/lib/datasrc/memory/zone_writer_local.cc b/src/lib/datasrc/memory/zone_writer_local.cc
index 44ff03cb5c65e2438860ee82acb452018cbf01d1..de3d91baecde856024e5bb1432f66cc0599d7f86 100644 (file)
--- a/src/lib/datasrc/memory/zone_writer_local.cc
+++ b/src/lib/datasrc/memory/zone_writer_local.cc
@@ -71,8 +71,9 @@ ZoneWriterLocal::install() {
     if (table == NULL) {
         isc_throw(isc::InvalidOperation, "No zone table present");
     }
-    ZoneTable::AddResult result(table->addZone(segment_->getMemorySegment(),
-                                               rrclass_, origin_, zone_data_));
+    const ZoneTable::AddResult result(table->addZone(
+                                          segment_->getMemorySegment(),
+                                          rrclass_, origin_, zone_data_));
 
     data_ready_ = false;
     zone_data_ = result.zone_data;