consent: Make getTargetedID() static.

This function is called statically several places, so let us make it
static to avoid the warnings.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2612 44740490-163a-0410-bde0-09ae8108e29a

modules/consent/lib/Auth/Process/Consent.php

@@ -223,7 +223,7 @@ class sspmod_consent_Auth_Process_Consent extends SimpleSAML_Auth_ProcessingFilt
 	/**
 	 * Get a targeted ID. An identifier that is unique per SP entity ID.
 	 */
-	public function getTargetedID($userid, $source, $destination) {
+	public static function getTargetedID($userid, $source, $destination) {
 		return hash('sha1', $userid . '|' . SimpleSAML_Utilities::getSecretSalt() . '|' . $source . '|' . $destination);
 	}