[gnome-calendar] year-view: prevent segfault when there's no child

[Erick Pérez Castellanos <erickpc src gnome org>]

commit d76ba04d921748f8298d0a51af654bd955fdaaf7
Author: Erick Pérez Castellanos <erick red gmail com>
Date:   Tue Jan 20 13:46:22 2015 -0500

    year-view: prevent segfault when there's no child

 src/gcal-year-view.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-year-view.c b/src/gcal-year-view.c
index 4dc9a7b..8c034b3 100644
--- a/src/gcal-year-view.c
+++ b/src/gcal-year-view.c
@@ -1116,7 +1116,7 @@ gcal_year_view_component_removed (ECalDataModelSubscriber *subscriber,
   for (l = children; l != NULL; l = g_list_next (l))
     {
       GcalEventWidget *child_widget = GCAL_EVENT_WIDGET (gtk_bin_get_child (GTK_BIN (l->data)));
-      if (g_strcmp0 (uuid, gcal_event_widget_peek_uuid (child_widget)) == 0)
+      if (child_widget != NULL && g_strcmp0 (uuid, gcal_event_widget_peek_uuid (child_widget)) == 0)
         gtk_widget_destroy (GTK_WIDGET (child_widget));
     }
   g_list_free (children);