[glom] Dialog_ImportCSV: Some use of std::unique_ptr<> instead of naked news.

[Murray Cumming <murrayc src gnome org>]

commit 70172b4eb11084dc7a4f2220b570dc8d6ca2d01d
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Feb 5 10:20:50 2016 +0100

    Dialog_ImportCSV: Some use of std::unique_ptr<> instead of naked news.

 glom/import_csv/dialog_import_csv.cc |   12 ++++++------
 glom/import_csv/dialog_import_csv.h  |    4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/glom/import_csv/dialog_import_csv.cc b/glom/import_csv/dialog_import_csv.cc
index 8509f8f..78383b4 100644
--- a/glom/import_csv/dialog_import_csv.cc
+++ b/glom/import_csv/dialog_import_csv.cc
@@ -520,23 +520,23 @@ void Dialog_Import_CSV::setup_sample_model(const CsvParser::type_row_strings& ro
   for(guint i = 0; i < m_cols_count; ++ i)
   {
     const Glib::ustring& data = row[i];
-    m_sample_view->append_column(*Gtk::manage(create_sample_column(data, i)));
+    m_sample_view->append_column(*Gtk::manage(create_sample_column(data, i).release()));
   }
 }
 
-Gtk::TreeViewColumn* Dialog_Import_CSV::create_sample_column(const Glib::ustring& title, guint index)
+std::unique_ptr<Gtk::TreeViewColumn> Dialog_Import_CSV::create_sample_column(const Glib::ustring& title, 
guint index)
 {
-  auto col = new Gtk::TreeViewColumn(title);
+  auto col = std::make_unique<Gtk::TreeViewColumn>(title);
   auto cell = create_sample_cell(index);
-  col->pack_start(*Gtk::manage(cell), true);
+  col->pack_start(*Gtk::manage(cell.release()), true);
   col->set_cell_data_func(*cell, sigc::bind(sigc::mem_fun(*this, &Dialog_Import_CSV::field_data_func), 
index));
   col->set_sizing(Gtk::TREE_VIEW_COLUMN_AUTOSIZE);
   return col;
 }
 
-Gtk::CellRendererCombo* Dialog_Import_CSV::create_sample_cell(guint index)
+std::unique_ptr<Gtk::CellRendererCombo> Dialog_Import_CSV::create_sample_cell(guint index)
 {
-  auto cell = new Gtk::CellRendererCombo;
+  auto cell = std::make_unique<Gtk::CellRendererCombo>();
   cell->property_model() = m_field_model_sorted;
   cell->property_text_column() = 0;
   cell->property_has_entry() = false;
diff --git a/glom/import_csv/dialog_import_csv.h b/glom/import_csv/dialog_import_csv.h
index 220acb7..e04111c 100644
--- a/glom/import_csv/dialog_import_csv.h
+++ b/glom/import_csv/dialog_import_csv.h
@@ -80,8 +80,8 @@ private:
   void begin_parse();
 
   void setup_sample_model(const CsvParser::type_row_strings& row);
-  Gtk::TreeViewColumn* create_sample_column(const Glib::ustring& title, guint index);
-  Gtk::CellRendererCombo* create_sample_cell(guint index);
+  std::unique_ptr<Gtk::TreeViewColumn> create_sample_column(const Glib::ustring& title, guint index);
+  std::unique_ptr<Gtk::CellRendererCombo> create_sample_cell(guint index);
 
   //CellRenderer cell_data_func callbacks:
   void line_data_func(Gtk::CellRenderer* renderer, const Gtk::TreeModel::iterator& iter);