[gnome-todo] gtd-panel-today: fix leak of GDateTime

[Victor Toso de Carvalho <victortoso src gnome org>]

commit 67a1ced9095e965b257959ee5062f235df820911
Author: Victor Toso <me victortoso com>
Date:   Thu Oct 27 23:23:17 2016 +0200

    gtd-panel-today: fix leak of GDateTime
    
    1,920 bytes in 60 blocks are definitely lost in loss record 15,758 of 16,018
       at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
       by 0xA5229D5: g_malloc (gmem.c:94)
       by 0xA53CB3D: g_slice_alloc (gslice.c:1025)
       by 0xA53CB7D: g_slice_alloc0 (gslice.c:1051)
       by 0xA4FEE8B: g_date_time_alloc (gdatetime.c:428)
       by 0xA4FF688: g_date_time_new (gdatetime.c:957)
       by 0xA4FF8DF: g_date_time_new_utc (gdatetime.c:1049)
       by 0x42468C: gtd_task__convert_icaltime (gtd-task.c:190)
       by 0x4259AF: gtd_task_get_due_date (gtd-task.c:952)
       by 0x436922: gtd_panel_today_count_tasks (gtd-panel-today.c:105)
    
    Signed-off-by: Victor Toso <victortoso redhat com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773606

 plugins/today-panel/gtd-panel-today.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/plugins/today-panel/gtd-panel-today.c b/plugins/today-panel/gtd-panel-today.c
index 19ddb3e..d2bddf8 100644
--- a/plugins/today-panel/gtd-panel-today.c
+++ b/plugins/today-panel/gtd-panel-today.c
@@ -105,7 +105,10 @@ gtd_panel_today_count_tasks (GtdPanelToday *panel)
           task_dt = gtd_task_get_due_date (t->data);
 
           if (!is_today (task_dt))
-            continue;
+            {
+              g_clear_pointer (&task_dt, g_date_time_unref);
+              continue;
+            }
 
           panel->task_list = g_list_prepend (panel->task_list, t->data);