ircfmt: null nickname for 433

diff --git a/src/ircfmt.c b/src/ircfmt.c
index 91db3ee..969c373 100644 (file)
--- a/src/ircfmt.c
+++ b/src/ircfmt.c
@@ -590,7 +590,7 @@ void err_erroneusnickname(struct client_data *client, const char *nick) // 432
 }
 void err_nicknameinuse(struct client_data *client, const char *nick) // 433
 {
-       copy_strf(&databuf, ":%s 433 %s %s :Nickname is already in use\r\n", hostname, client->nick, nick);
+       copy_strf(&databuf, ":%s 433 %s %s :Nickname is already in use\r\n", hostname, client->nick ? client->nick : "*", nick);
 }
 void err_usernotinchannel(struct client_data *client, const char *nick, struct channel *chan) // 441
 {