[glom] Some use of auto to avoid signed/unsigned mismatches.

[Murray Cumming <murrayc src gnome org>]

commit 9b611bdeb39290fd7ee1e6ea3a7a72253a7d4c29
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Mar 29 17:38:33 2016 +0200

    Some use of auto to avoid signed/unsigned mismatches.

 glom/libglom/sql_utils.cc             |    4 ++--
 glom/mode_data/db_adddel/db_adddel.cc |    2 +-
 glom/utility_widgets/adddel/adddel.cc |    2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/glom/libglom/sql_utils.cc b/glom/libglom/sql_utils.cc
index 013c26e..a6e3656 100644
--- a/glom/libglom/sql_utils.cc
+++ b/glom/libglom/sql_utils.cc
@@ -268,7 +268,7 @@ Glib::RefPtr<Gnome::Gda::SqlBuilder> build_sql_select_with_where_clause(const Gl
     //Add the WHERE clause:
     if(!where_clause.empty())
     {
-      const int id = builder->import_expression(where_clause);
+      const auto id = builder->import_expression(where_clause);
       builder->set_where(id);
     }
 
@@ -553,7 +553,7 @@ Glib::RefPtr<Gnome::Gda::SqlBuilder> build_sql_update_with_where_clause(
     //Add the WHERE clause:
     if(!where_clause.empty())
     {
-      const int id = builder->import_expression(where_clause);
+      const auto id = builder->import_expression(where_clause);
       builder->set_where(id);
     }
   }
diff --git a/glom/mode_data/db_adddel/db_adddel.cc b/glom/mode_data/db_adddel/db_adddel.cc
index 1a32654..42e9d42 100644
--- a/glom/mode_data/db_adddel/db_adddel.cc
+++ b/glom/mode_data/db_adddel/db_adddel.cc
@@ -1669,7 +1669,7 @@ guint DbAddDel::treeview_append_column(const Glib::ustring& title, Gtk::CellRend
   //But we must call set_fixed_width() later or we will have a zero-width column.
   pViewColumn->set_sizing(Gtk::TREE_VIEW_COLUMN_FIXED);
 
-  guint cols_count = m_TreeView.append_column(*pViewColumn);
+  auto cols_count = m_TreeView.append_column(*pViewColumn);
 
   auto layout_item = m_column_items[model_column_index];
   auto layout_item_field = std::dynamic_pointer_cast<const LayoutItem_Field>(layout_item);
diff --git a/glom/utility_widgets/adddel/adddel.cc b/glom/utility_widgets/adddel/adddel.cc
index eb792f4..d53e9a9 100644
--- a/glom/utility_widgets/adddel/adddel.cc
+++ b/glom/utility_widgets/adddel/adddel.cc
@@ -1302,7 +1302,7 @@ guint AddDel::treeview_append_column(const Glib::ustring& title, Gtk::CellRender
 {
   auto pViewColumn = Gtk::manage( new TreeViewColumnGlom(title, cellrenderer) );
   pViewColumn->set_renderer(cellrenderer, model_column); //render it via the default "text" property.
-  guint cols_count = m_TreeView.append_column(*pViewColumn);
+  auto cols_count = m_TreeView.append_column(*pViewColumn);
 
   //Allow the column to be reordered by dragging and dropping the column header:
   pViewColumn->set_reorderable();