Merge pull request #1778 from ProgVal/empty-realname

Add missing argument to ERR_NEEDMOREPARAMS on USER commands.

irc/handlers.go

 
 	username, realname := msg.Params[0], msg.Params[3]
 	if len(realname) == 0 {
-		rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), client.t("Not enough parameters"))
+		rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), "USER", client.t("Not enough parameters"))
 		return false
 	}