[empathy] event_manager_add: don't crash if approval is NULL (#646555)

[Guillaume Desmottes <gdesmott src gnome org>]

commit 19cbd39e5eb916ecc4dc2f0705a204d0c7ca6e3a
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Mon Apr 4 10:23:53 2011 +0200

    event_manager_add: don't crash if approval is NULL (#646555)
    
    When adding a "subscription request" event there is no EventManagerApproval
    associated with the event.

 src/empathy-event-manager.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/empathy-event-manager.c b/src/empathy-event-manager.c
index dbb95cd..27f8a0b 100644
--- a/src/empathy-event-manager.c
+++ b/src/empathy-event-manager.c
@@ -237,7 +237,8 @@ event_manager_add (EmpathyEventManager *manager,
   event->public.header = g_strdup (header);
   event->public.message = g_strdup (message);
   event->public.must_ack = (func != NULL);
-  event->public.handler_instance = approval->handler_instance;
+  if (approval != NULL)
+    event->public.handler_instance = approval->handler_instance;
   event->inhibit = FALSE;
   event->func = func;
   event->user_data = user_data;