[epiphany] ephy-history-service: fix CLEAR signal emission

[Xan Lopez <xan src gnome org>]

commit c9644b2636ccd87a116f303fd0373c89950629ae
Author: Xan Lopez <xan igalia com>
Date:   Fri Aug 31 17:43:50 2012 +0200

    ephy-history-service: fix CLEAR signal emission
    
    We were only emitting it if we happened to have a callback method
    associated with the history message, that does not make sense.

 lib/history/ephy-history-service.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/lib/history/ephy-history-service.c b/lib/history/ephy-history-service.c
index 9c5d72e..64b1760 100644
--- a/lib/history/ephy-history-service.c
+++ b/lib/history/ephy-history-service.c
@@ -425,13 +425,15 @@ ephy_history_service_execute_job_callback (gpointer data)
 {
   EphyHistoryServiceMessage *message = (EphyHistoryServiceMessage*) data;
 
-  g_assert (message->callback);
+  g_assert (message->callback || message->type == CLEAR);
 
   if (g_cancellable_is_cancelled (message->cancellable)) {
     ephy_history_service_message_free (message);
     return FALSE;
   }
-  message->callback (message->service, message->success, message->result, message->user_data);
+
+  if (message->callback)
+    message->callback (message->service, message->success, message->result, message->user_data);
 
   if (message->type == CLEAR)
     g_signal_emit (message->service, signals[CLEARED], 0);
@@ -967,7 +969,7 @@ ephy_history_service_process_message (EphyHistoryService *self,
   message->result = NULL;
   message->success = method (message->service, message->method_argument, &message->result);
 
-  if (message->callback)
+  if (message->callback || message->type == CLEAR)
     g_idle_add ((GSourceFunc)ephy_history_service_execute_job_callback, message);
   else
     ephy_history_service_message_free (message);