Avoid E_STRICT notices. see #18975

git-svn-id: https://develop.svn.wordpress.org/trunk@19094 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/class-wp.php

@@ -572,7 +572,7 @@ class WP_MatchesMapRegex {
 	 * @param array  $matches data used for substitution
 	 * @return string
 	 */
-	function apply($subject, $matches) {
+	public static function apply($subject, $matches) {
 		$oSelf = new WP_MatchesMapRegex($subject, $matches);
 		return $oSelf->output;
 	}