[gedit] tab: fix critical message with network unavailable info bar

[Sébastien Wilmet <swilmet src gnome org>]

commit e8c3ed23c40953017c5af7f3f5216ea3d7b4484a
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Apr 11 10:19:17 2015 +0200

    tab: fix critical message with network unavailable info bar
    
    The critical message was:
    
    CRITICAL **: gedit_network_unavailable_info_bar_new:
    assertion 'G_IS_FILE (location)' failed
    
    The location can be NULL for an Unsaved Document.

 gedit/gedit-tab.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/gedit/gedit-tab.c b/gedit/gedit-tab.c
index a0395fd..f929ecc 100644
--- a/gedit/gedit-tab.c
+++ b/gedit/gedit-tab.c
@@ -1232,12 +1232,16 @@ _gedit_tab_set_network_available (GeditTab *tab,
                                  gboolean  enable)
 {
        GeditDocument *doc;
+       GtkSourceFile *file;
+       GFile *location;
 
        g_return_if_fail (GEDIT_IS_TAB (tab));
 
        doc = gedit_tab_get_document (tab);
+       file = gedit_document_get_file (doc);
+       location = gtk_source_file_get_location (file);
 
-       if (gedit_document_is_local (doc))
+       if (gedit_document_is_local (doc) || location == NULL)
        {
                return;
        }
@@ -1248,16 +1252,14 @@ _gedit_tab_set_network_available (GeditTab *tab,
        }
        else
        {
-               GtkSourceFile *file = gedit_document_get_file (doc);
-               GFile *location = gtk_source_file_get_location (file);
-               GtkWidget *bar = gedit_network_unavailable_info_bar_new (location);
+               GtkWidget *info_bar = gedit_network_unavailable_info_bar_new (location);
 
-               g_signal_connect (bar,
+               g_signal_connect (info_bar,
                                  "response",
                                  G_CALLBACK (network_available_warning_info_bar_response),
                                  tab);
 
-               set_info_bar (tab, bar, GTK_RESPONSE_CLOSE);
+               set_info_bar (tab, info_bar, GTK_RESPONSE_CLOSE);
        }
 }