IrcAdmin: don't crash by trying to tell #chan that you just left #chan

BUGS

@@ -1,7 +1,5 @@
 dr.botzo --- BUGS
 
-   * being in #chan and telling the bot to !part #chan is a crash if it can't message
-     #chan after it leaves
    * Countdown formatting has singular nouns for negative numbers (-21 day)
    * probably many, many more
    * possible to have not well-formed XML in pywapi.get_weather_from_google:

modules/IrcAdmin.py

@@ -95,12 +95,14 @@ class IrcAdmin(Module):
 
     def sub_part_channel(self, connection, event, nick, userhost, what, admin_unlocked):
         whats = what.split(' ')
+        target = event.target()
 
         channel = whats[1]
         if irclib.is_channel(channel):
             connection.part(channel, ' '.join(whats[2:]))
-            replystr = 'Parted ' + channel + '.'
-            return replystr
+            if target != channel:
+                replystr = 'Parted ' + channel + '.'
+                return replystr
 
     def sub_quit_irc(self, connection, event, nick, userhost, what, admin_unlocked):
         whats = what.split(' ')