SAML2/Binding: Fix misspelling of array_key_exists.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2272 44740490-163a-0410-bde0-09ae8108e29a

lib/SAML2/Binding.php

@@ -63,7 +63,7 @@ abstract class SAML2_Binding {
 		case 'POST':
 			if (array_key_exists('SAMLRequest', $_REQUEST) || array_key_exists('SAMLResponse', $_REQUEST)) {
 				return new SAML2_HTTPPost();
-			} elseif (array_key_exits('CONTENT_TYPE', $_SERVER) && $_SERVER['CONTENT_TYPE'] === 'text/xml'){
+			} elseif (array_key_exists('CONTENT_TYPE', $_SERVER) && $_SERVER['CONTENT_TYPE'] === 'text/xml'){
 				return new SAML2_SOAP();
 			}
 			break;