Format UsePAM setting when using sshd -T.

Part of bz#2346, patch from jjelen at redhat com.
diff --git a/servconf.c b/servconf.c
index 3185462..ad7e7a3 100644
--- a/servconf.c
+++ b/servconf.c
@@ -2094,7 +2094,7 @@
 
 	/* integer arguments */
 #ifdef USE_PAM
-	dump_cfg_int(sUsePAM, o->use_pam);
+	dump_cfg_fmtint(sUsePAM, o->use_pam);
 #endif
 	dump_cfg_int(sServerKeyBits, o->server_key_bits);
 	dump_cfg_int(sLoginGraceTime, o->login_grace_time);