Dont filter out own MUC messages if muc history is set to 'regular'

We use the same incoming function as for regular incoming text here. But
don't want to filter out our own messages since we didn't print them
during sending.

Follow up to 8ee2cdadc8

src/event/server_events.c

@@ -324,7 +324,7 @@ sv_ev_room_message(ProfMessage *message)
     GList *triggers = prefs_message_get_triggers(message->plain);
 
     _clean_incoming_message(message);
-    mucwin_incoming_msg(mucwin, message, mentions, triggers);
+    mucwin_incoming_msg(mucwin, message, mentions, triggers, TRUE);
 
     g_slist_free(mentions);