[tracker] tracker-store: clear the watchdog timer when it fires

[Giovanni Campagna <gcampagna src gnome org>]

commit 67583977aba828e580edc7a8429376f8cc520ac3
Author: Giovanni Campagna <scampa giovanni gmail com>
Date:   Tue Mar 3 15:20:03 2015 -0800

    tracker-store: clear the watchdog timer when it fires
    
    Otherwise glib complain that we remove an invalid source.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745565

 src/tracker-store/tracker-store.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-store/tracker-store.vala b/src/tracker-store/tracker-store.vala
index 0887c7f..00a40bb 100644
--- a/src/tracker-store/tracker-store.vala
+++ b/src/tracker-store/tracker-store.vala
@@ -106,6 +106,7 @@ public class Tracker.Store {
                                var query_task = (QueryTask) task;
                                query_task.watchdog_id = Timeout.add_seconds (max_task_time, () => {
                                        query_task.cancellable.cancel ();
+                                       query_task.watchdog_id = 0;
                                        return false;
                                });
                        }