[glom/gtkmm4v3: 18/21] Make code slightly nicer.

[Murray Cumming <murrayc src gnome org>]

commit dc21ebcc571b133c834b328aa9daeb11cd11b4d8
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Mar 14 10:18:07 2017 +0100

    Make code slightly nicer.

 glom/dialog_existing_or_new.cc |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/glom/dialog_existing_or_new.cc b/glom/dialog_existing_or_new.cc
index 5d8ece3..3810e9d 100644
--- a/glom/dialog_existing_or_new.cc
+++ b/glom/dialog_existing_or_new.cc
@@ -739,12 +739,13 @@ void Dialog_ExistingOrNew::on_service_removed(const Glib::ustring& name, const G
   auto children = m_iter_existing_network->children();
   for(auto iter = children.begin(); iter != children.end(); ++ iter)
   {
-    if((*iter)[m_existing_columns.m_col_service_name] == name)
+    auto& row = *iter;
+    if(row[m_existing_columns.m_col_service_name] == name)
     {
       const auto was_expanded = m_existing_view->row_expanded(m_existing_model->get_path(iter));
 
       // Remove from store
-      epc_service_info_unref((*iter)[m_existing_columns.m_col_service_info]);
+      epc_service_info_unref(row[m_existing_columns.m_col_service_info]);
       m_existing_model->erase(iter);
 
       // Reinsert dummy, if necessary