saml2: Make SP authentication source throw a detailed exception when receiving...

saml2: Make SP authentication source throw a detailed exception when receiving an error from the IdP.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1580 44740490-163a-0410-bde0-09ae8108e29a

modules/saml2/www/sp/acs.php

@@ -34,8 +34,7 @@ $result = $authnResponse->process();
 /* Check status code. */
 if($result === FALSE) {
 	/* Not successful. */
-	$statusCode = $authnResponse->findstatus();
-	throw new Exception('Error authenticating: ' . $statusCode);
+	SimpleSAML_Auth_State::throwException($state, $authnResponse->getStatus()->toException());
 }
 
 /* The response should include the entity id of the IdP. */