Skip PrintLastLog in config dump mode.

When DISABLE_LASTLOG is set, do not try to include PrintLastLog in the
config dump since it'll be reported as UNKNOWN.
diff --git a/servconf.c b/servconf.c
index c0b6f6e..b19d30e 100644
--- a/servconf.c
+++ b/servconf.c
@@ -2273,7 +2273,9 @@
 	dump_cfg_fmtint(sChallengeResponseAuthentication,
 	    o->challenge_response_authentication);
 	dump_cfg_fmtint(sPrintMotd, o->print_motd);
+#ifndef DISABLE_LASTLOG
 	dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
+#endif
 	dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
 	dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
 	dump_cfg_fmtint(sPermitTTY, o->permit_tty);