Fix typo

Author: pitbulk

lib/Saml2/Response.php

@@ -508,10 +508,10 @@ public function validateTimestamps()
         for ($i = 0; $i < $timestampNodes->length; $i++) {
             $nbAttribute = $timestampNodes->item($i)->attributes->getNamedItem("NotBefore");
             $naAttribute = $timestampNodes->item($i)->attributes->getNamedItem("NotOnOrAfter");
-            if ($nbAttribute && Onelogin_SAML2_Utils::parseSAML2Time($nbAttribute->textContent) > time() + OneLogin_Saml2_Constants::ALOWED_CLOCK_DRIFT) {
+            if ($nbAttribute && OneLogin_SAML2_Utils::parseSAML2Time($nbAttribute->textContent) > time() + OneLogin_Saml2_Constants::ALOWED_CLOCK_DRIFT) {
                 return false;
             }
-            if ($naAttribute && Onelogin_SAML2_Utils::parseSAML2Time($naAttribute->textContent) + OneLogin_Saml2_Constants::ALOWED_CLOCK_DRIFT <= time()) {
+            if ($naAttribute && OneLogin_SAML2_Utils::parseSAML2Time($naAttribute->textContent) + OneLogin_Saml2_Constants::ALOWED_CLOCK_DRIFT <= time()) {
                 return false;
             }
         }