[gtk+/gtk-3-14] gtkplacessidebar: protect for checking a null event

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 2db7e3eaa8ed95adde5c2f8753cd3f63766ae67c
Author: Carlos Soriano <csoriano gnome org>
Date:   Mon Sep 14 15:09:57 2015 +0200

    gtkplacessidebar: protect for checking a null event
    
    We are using the current gtk event position to check if
    the user clicked in the eject button of a row.
    However, we are calling this in row-activated signal, which
    can happens when the gtk+ mainloop already removed the "current"
    event, and therefore we were trying to access a null event position
    which crashes the sidebar.
    
    To fix it check if we have as current event, and if not,
    we will not check for the position. But it's better than crashing,
    and shouldn't happen too much.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754995

 gtk/gtkplacessidebar.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index ad98c65..2d23f44 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -1423,7 +1423,8 @@ clicked_eject_button (GtkPlacesSidebar  *sidebar,
   GdkEvent *event = gtk_get_current_event ();
   GdkEventButton *button_event = (GdkEventButton *) event;
 
-  if ((event->type == GDK_BUTTON_PRESS || event->type == GDK_BUTTON_RELEASE) &&
+  if (event != NULL &&
+      (event->type == GDK_BUTTON_PRESS || event->type == GDK_BUTTON_RELEASE) &&
        over_eject_button (sidebar, button_event->x, button_event->y, path))
     return TRUE;