[gedit] open document selector: fix gtk_tree_model_get_iter_first() usage

[Jeremy Bicha <jbicha src gnome org>]

commit 599ab554793b78027ac89711c4a89e933a18ac3c
Author: Garrett Regier <garrettregier gmail com>
Date:   Sun Jan 15 13:28:48 2017 -0800

    open document selector: fix gtk_tree_model_get_iter_first() usage
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777280

 gedit/gedit-open-document-selector.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gedit/gedit-open-document-selector.c b/gedit/gedit-open-document-selector.c
index 327ecbf..5389ef0 100644
--- a/gedit/gedit-open-document-selector.c
+++ b/gedit/gedit-open-document-selector.c
@@ -778,13 +778,13 @@ on_row_activated (GtkTreeView               *treeview,
                   GtkTreeViewColumn         *column G_GNUC_UNUSED,
                   GeditOpenDocumentSelector *selector)
 {
+       GtkTreeModel *liststore = GTK_TREE_MODEL (selector->liststore);
        GtkTreeSelection *selection;
        GtkTreeIter iter;
        gchar *uri;
 
-       gtk_tree_model_get_iter (GTK_TREE_MODEL (selector->liststore), &iter, path);
-       gtk_tree_model_get (GTK_TREE_MODEL (selector->liststore),
-                           &iter,
+       g_return_if_fail (gtk_tree_model_get_iter (liststore, &iter, path));
+       gtk_tree_model_get (liststore, &iter,
                            URI_COLUMN, &uri,
                            -1);