[evolution-ews] Fix few memory leaks around gtk_tree_view_new_with_model()

[Milan Crha <mcrha src gnome org>]

commit 124520394ab9e2e7b15ca7cd798e097665dde1cc
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jul 4 14:10:40 2018 +0200

    Fix few memory leaks around gtk_tree_view_new_with_model()

 src/configuration/e-ews-edit-folder-permissions.c    | 6 ++++--
 src/configuration/e-ews-search-user.c                | 6 ++++--
 src/configuration/e-mail-config-ews-delegates-page.c | 6 ++++--
 3 files changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/src/configuration/e-ews-edit-folder-permissions.c 
b/src/configuration/e-ews-edit-folder-permissions.c
index 64c87361..86e2b625 100644
--- a/src/configuration/e-ews-edit-folder-permissions.c
+++ b/src/configuration/e-ews-edit-folder-permissions.c
@@ -854,6 +854,7 @@ create_permissions_tree_view (GObject *dialog,
                               struct EEwsPermissionsDialogWidgets *widgets)
 {
        GtkTreeView *tree_view;
+       GtkTreeModel *model;
        GtkTreeSelection *selection;
        GtkCellRenderer *renderer;
        GtkTreeViewColumn *column;
@@ -861,8 +862,9 @@ create_permissions_tree_view (GObject *dialog,
 
        g_return_val_if_fail (widgets != NULL, NULL);
 
-       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (
-               GTK_TREE_MODEL (gtk_list_store_new (5, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER, 
G_TYPE_UINT, G_TYPE_BOOLEAN))));
+       model = GTK_TREE_MODEL (gtk_list_store_new (5, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER, 
G_TYPE_UINT, G_TYPE_BOOLEAN));
+       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (model));
+       g_object_unref (model);
 
        renderer = gtk_cell_renderer_text_new ();
        g_object_set (renderer, "editable", FALSE, NULL);
diff --git a/src/configuration/e-ews-search-user.c b/src/configuration/e-ews-search-user.c
index 46195988..4c20fb89 100644
--- a/src/configuration/e-ews-search-user.c
+++ b/src/configuration/e-ews-search-user.c
@@ -413,6 +413,7 @@ create_users_tree_view (GtkWidget *dialog,
                         struct EEwsSearchUserData *pgu)
 {
        GtkTreeView *tree_view;
+       GtkTreeModel *model;
        GtkTreeSelection *selection;
        GtkCellRenderer *renderer;
        GtkTreeViewColumn *column;
@@ -421,8 +422,9 @@ create_users_tree_view (GtkWidget *dialog,
        g_return_val_if_fail (dialog != NULL, NULL);
        g_return_val_if_fail (pgu != NULL, NULL);
 
-       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (
-               GTK_TREE_MODEL (gtk_list_store_new (5, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, 
G_TYPE_POINTER, G_TYPE_UINT))));
+       model = GTK_TREE_MODEL (gtk_list_store_new (5, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, 
G_TYPE_POINTER, G_TYPE_UINT));
+       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (model));
+       g_object_unref (model);
 
        renderer = gtk_cell_renderer_text_new ();
        g_object_set (renderer, "editable", FALSE, NULL);
diff --git a/src/configuration/e-mail-config-ews-delegates-page.c 
b/src/configuration/e-mail-config-ews-delegates-page.c
index 1a127d13..b802e062 100644
--- a/src/configuration/e-mail-config-ews-delegates-page.c
+++ b/src/configuration/e-mail-config-ews-delegates-page.c
@@ -977,6 +977,7 @@ static GtkWidget *
 create_users_tree_view (EMailConfigEwsDelegatesPage *page)
 {
        GtkTreeView *tree_view;
+       GtkTreeModel *model;
        GtkTreeSelection *selection;
        GtkCellRenderer *renderer;
        GtkTreeViewColumn *column;
@@ -984,8 +985,9 @@ create_users_tree_view (EMailConfigEwsDelegatesPage *page)
 
        g_return_val_if_fail (page != NULL, NULL);
 
-       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (
-               GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_POINTER))));
+       model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_POINTER));
+       tree_view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (model));
+       g_object_unref (model);
        gtk_tree_view_set_headers_visible (tree_view, FALSE);
 
        renderer = gtk_cell_renderer_text_new ();