nfsd: minor nfsd_svc() cleanup

More idiomatic to put the error case in the if clause.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfssvc.c

@@ -443,7 +443,8 @@ nfsd_svc(unsigned short port, int nrservs)
 	if (error)
 		goto out_shutdown;
 	error = svc_set_num_threads(nfsd_serv, NULL, nrservs);
-	if (error == 0)
+	if (error)
+		goto out_destroy;
 	/* We are holding a reference to nfsd_serv which
 	 * we don't want to count in the return value,
 	 * so subtract 1