s_auth.c: Fix off-by-one errors in last commit.

diff --git a/ircd/s_auth.c b/ircd/s_auth.c
index 476cce5610e347af399065c528807671c52fe51b..b3e993af3137b147814043082d07d2626e9daec6 100644 (file)
--- a/ircd/s_auth.c
+++ b/ircd/s_auth.c
@@ -270,12 +270,13 @@ static int auth_set_username(struct AuthRequest *auth)
   {
     /* Prepend ~ to user->username. */
     s = user->username;
-    s[USERLEN-1] = '\0';
+    s[USERLEN] = '\0';
     for (last = '~'; (ch = *s) != '\0'; )
     {
       *s++ = last;
       last = ch;
     }
+    *s++ = last;
     *s = '\0';
   } /* else cleaned version of client-provided name is in place */