[gtk+] popover: Only give back focus to drawable widgets

[Carlos Garnacho <carlosg src gnome org>]

commit 08e9c93b17d767e932df8d112cafd0fd1d96e282
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Mar 6 20:38:11 2014 +0100

    popover: Only give back focus to drawable widgets
    
    If the previous focus widget is not drawable anymore, don't even
    bother in transmitting the focus grab to it.

 gtk/gtkpopover.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index 8e1c56b..1cc9e9c 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -275,10 +275,12 @@ gtk_popover_apply_modality (GtkPopover *popover,
     {
       gtk_grab_remove (GTK_WIDGET (popover));
 
-      /* Let prev_focus_widget regain focus */
       if (priv->prev_focus_widget)
         {
-          gtk_widget_grab_focus (priv->prev_focus_widget);
+          /* Let prev_focus_widget regain focus */
+          if (gtk_widget_is_drawable (priv->prev_focus_widget))
+            gtk_widget_grab_focus (priv->prev_focus_widget);
+
           g_object_unref (priv->prev_focus_widget);
           priv->prev_focus_widget = NULL;
         }