[gnome-calendar] event: Fix leak of uid (string)

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit ea70173cd3e761cdcd53327a3848a2b6b9f2fcf4
Author: Victor Toso <me victortoso com>
Date:   Fri Sep 30 23:56:57 2016 +0200

    event: Fix leak of uid (string)
    
    28,337 bytes in 415 blocks are definitely lost in loss record 18,432 of 18,507
       at 0x4C2FC47: realloc (vg_replace_malloc.c:785)
       by 0xA88021D: vasprintf (in /usr/lib64/libc-2.24.so)
       by 0x9A593FC: g_vasprintf (gprintf.c:316)
       by 0x9A292F7: g_strdup_vprintf (gstrfuncs.c:514)
       by 0x9A2939C: g_strdup_printf (gstrfuncs.c:540)
       by 0x42A10B: gcal_event_update_uid_internal (gcal-event.c:192)
       by 0x42BF52: gcal_event_set_source (gcal-event.c:1217)
       by 0x42ADCA: gcal_event_set_property (gcal-event.c:480)
       by 0x956B39B: object_set_property (gobject.c:1423)
       by 0x956BFDF: g_object_new_internal (gobject.c:1817)
       by 0x956CB24: g_object_new_valist (gobject.c:2042)
       by 0x878945D: g_initable_new_valist (ginitable.c:224)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772272

 src/gcal-event.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gcal-event.c b/src/gcal-event.c
index eb24507..288853a 100644
--- a/src/gcal-event.c
+++ b/src/gcal-event.c
@@ -373,6 +373,7 @@ gcal_event_finalize (GObject *object)
   g_clear_pointer (&self->timezone, g_time_zone_unref);
   g_clear_pointer (&self->description, g_free);
   g_clear_pointer (&self->alarms, g_hash_table_unref);
+  g_clear_pointer (&self->uid, g_free);
   g_clear_object (&self->component);
   g_clear_object (&self->source);