[gtk+] popover: Keep a ref on the parent scrollable

[Carlos Garnacho <carlosg src gnome org>]

commit 5837c1c7101fa32d39ed7be81f1409275354002d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Feb 5 14:17:51 2015 +0100

    popover: Keep a ref on the parent scrollable
    
    This ensures the scrollable is still alive on dispose(), and properly unset
    after disconnecting all signal handlers.

 gtk/gtkpopover.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index 38dcf51..c6afcfa 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -1591,12 +1591,15 @@ _gtk_popover_set_scrollable (GtkPopover    *popover,
           g_object_unref (priv->hadj);
           priv->hadj = NULL;
         }
+
+      g_object_unref (priv->parent_scrollable);
     }
 
   priv->parent_scrollable = scrollable;
 
   if (scrollable)
     {
+      g_object_ref (scrollable);
       priv->vadj = gtk_scrollable_get_vadjustment (scrollable);
       priv->hadj = gtk_scrollable_get_hadjustment (scrollable);