[gnome-photos] offset-controller: Be robust against PhotosTrackerQueue failures

[Debarshi Ray <debarshir src gnome org>]

commit d9f4c826029ec87496fe033e982fe7adbdf27e34
Author: Debarshi Ray <debarshir gnome org>
Date:   Sat Dec 28 13:28:33 2013 +0100

    offset-controller: Be robust against PhotosTrackerQueue failures
    
    Fixes: https://bugzilla.gnome.org/704947

 src/photos-offset-controller.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-offset-controller.c b/src/photos-offset-controller.c
index 657f8cc..b0fb042 100644
--- a/src/photos-offset-controller.c
+++ b/src/photos-offset-controller.c
@@ -208,6 +208,9 @@ photos_offset_controller_reset_count (PhotosOffsetController *self)
   PhotosOffsetControllerPrivate *priv = self->priv;
   PhotosQuery *query;
 
+  if (G_UNLIKELY (priv->queue == NULL))
+    return;
+
   query = PHOTOS_OFFSET_CONTROLLER_GET_CLASS (self)->get_query (self);
   photos_tracker_queue_select (priv->queue,
                                query->sparql,