Fix SAML logout

packages/meteor-accounts-saml/saml_client.js

@@ -118,6 +118,10 @@ Meteor.loginWithSaml = function(options, callback) {
 Meteor.logoutWithSaml = function(options/*, callback*/) {
 	//Accounts.saml.idpInitiatedSLO(options, callback);
 	Meteor.call('samlLogout', options.provider, function(err, result) {
+		if (err || !result) {
+			MeteorLogout.apply(Meteor);
+			return;
+		}
 		// A nasty bounce: 'result' has the SAML LogoutRequest but we need a proper 302 to redirected from the server.
 		//window.location.replace(Meteor.absoluteUrl('_saml/sloRedirect/' + options.provider + '/?redirect='+result));
 		window.location.replace(Meteor.absoluteUrl('_saml/sloRedirect/' + options.provider + '/?redirect=' + encodeURIComponent(result)));