[glib] gtask: Fix a signed/unsigned integer comparison

[Philip Withnall <pwithnall src gnome org>]

commit c6838ffaa1dd5ff9d2b44f7eaffcd8ecf9886f2a
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Sep 17 15:07:25 2014 +0100

    gtask: Fix a signed/unsigned integer comparison
    
    The GSource times assigned to creation_time are always signed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736806

 gio/gtask.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gtask.c b/gio/gtask.c
index ad6e50f..ffa4dae 100644
--- a/gio/gtask.c
+++ b/gio/gtask.c
@@ -540,7 +540,7 @@ struct _GTask {
   GDestroyNotify task_data_destroy;
 
   GMainContext *context;
-  guint64 creation_time;
+  gint64 creation_time;
   gint priority;
   GCancellable *cancellable;
   gboolean check_cancellable;