Fix colouring.
Fix colouring.

Messages sent by the local user should appear blue, whilst from other users should be green.

Had left the check using a global though, so the deciding factor for blue was - is the upstream user called "ben2"?

--- a/client/LocalChatClient.py
+++ b/client/LocalChatClient.py
@@ -70,7 +70,7 @@
             color = "green"
             upstruser = msgbody['user'] # Temporary placeholder
             
-            if upstruser == USER:
+            if upstruser == self.user:
                 # One of our own, change the color
                 color = "blue"