[smuxi] Engine: explicitly flush message buffers in Session.Shutdown()

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

commit 622c8e9f5b9c73c09148ad33efb8c4b78bcb7f0b
Author: Mirco Bauer <meebey meebey net>
Date:   Sun Feb 23 18:55:09 2014 +0100

    Engine: explicitly flush message buffers in Session.Shutdown()

 src/Engine/Session.cs |   31 ++++++++++++++++++++++++++++---
 1 files changed, 28 insertions(+), 3 deletions(-)
---
diff --git a/src/Engine/Session.cs b/src/Engine/Session.cs
index 44fce40..158206d 100644
--- a/src/Engine/Session.cs
+++ b/src/Engine/Session.cs
@@ -1716,12 +1716,37 @@ namespace Smuxi.Engine
         {
             Trace.Call(clean, frontendManager);
 
+#if LOG4NET
+            f_Logger.Debug("Shutdown(): flushing all message buffers");
+#endif
+            lock (_Chats) {
+                foreach (var chat in _Chats) {
+                    try {
+                        chat.MessageBuffer.Flush();
+                    } catch (Exception ex) {
+#if LOG4NET
+                        f_Logger.ErrorFormat(
+                            "Shutdown(): {0}.MessageBuffer.Flush() " +
+                            "failed, continuing with shutdown...",
+                            chat.ToString()
+                        );
+                        f_Logger.Error("Shutdown(): Exception", ex);
+#endif
+                    }
+                }
+            }
+
+            if (!clean) {
+                return;
+            }
+
+#if LOG4NET
+            f_Logger.Debug("Shutdown(): disconnecting and disposing all protocol manangers");
+#endif
             lock (_ProtocolManagers) {
                 foreach (var protocolManager in _ProtocolManagers) {
                     try {
-                        if (clean) {
-                            protocolManager.Disconnect(frontendManager);
-                        }
+                        protocolManager.Disconnect(frontendManager);
                         protocolManager.Dispose();
                     } catch (Exception ex) {
 #if LOG4NET