fix typo

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1710 44740490-163a-0410-bde0-09ae8108e29a

modules/adfs/www/idp/prp.php

@@ -55,7 +55,7 @@ function ADFS_GenerateResponse($issuer, $target, $nameid, $attributes) {
 		$hasValue = FALSE;
 		$r = '<saml:Attribute AttributeNamespace="http://schemas.xmlsoap.org/claims" AttributeName="' . htmlspecialchars($name) .'">';
 		foreach ($values as $value) {
-			if (isset($value) or ($value !== '')) continue;
+			if ( (!isset($value)) or ($value === '')) continue;
 			$r .= '<saml:AttributeValue>' . htmlspecialchars($value) . '</saml:AttributeValue>';
 			$hasValue = TRUE;
 		}