[smuxi] Engine: aid diagnostics when a message buffer throws an exception

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit 63b6926e52f92ab52bca2395c7ab9225da619d45
Author: Mirco Bauer <meebey meebey net>
Date:   Wed Sep 3 19:33:30 2014 +0200

    Engine: aid diagnostics when a message buffer throws an exception

 src/Engine/Session.cs |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/Engine/Session.cs b/src/Engine/Session.cs
index 1ec86b9..9a7fe9e 100644
--- a/src/Engine/Session.cs
+++ b/src/Engine/Session.cs
@@ -1293,10 +1293,12 @@ namespace Smuxi.Engine
                 } catch (Exception ex) {
 #if LOG4NET
                     Trace.Call(chat, msg, ignoreFilters);
-                    f_Logger.Error(
-                        "AddMessageToChat(): " +
-                        "chat.MessageBuffer.Add() threw exception!", ex
+                    f_Logger.ErrorFormat(
+                        "AddMessageToChat({0}, {1}, {2}): " +
+                        "chat.MessageBuffer.Add() threw exception:",
+                        chat, msg, ignoreFilters
                     );
+                    f_Logger.Error("AddMessageToChat(): ", ex);
 #endif
                     if (chat.MessageBuffer is Db4oMessageBuffer ||
                         chat.MessageBuffer is SqliteMessageBuffer) {