avoid returning useless null

Author: craue

Twig/Extension/ChangeLanguageExtension.php

@@ -119,7 +119,7 @@ public function getName() {
 	 */
 	public function getLanguageName($locale, $forceLocaleForDisplay = null) {
 		if (empty($locale)) {
-			return null;
+			return;
 		}
 
 		$localeToUse = !empty($forceLocaleForDisplay) ? $forceLocaleForDisplay :

Twig/Extension/FormatDateTimeExtension.php

@@ -179,7 +179,7 @@ public function formatDateTime($value, $locale = null, $dateType = null, $timeTy
 	 */
 	protected function getFormattedDateTime($value, $locale, $dateType, $timeType, $timeZone = null) {
 		if ($value === null) {
-			return null;
+			return;
 		}
 
 		$valueToUse = $value;

Twig/Extension/FormatNumberExtension.php

@@ -125,7 +125,7 @@ public function formatSpelledOutNumber($value, $locale = null) {
 	 */
 	protected function getFormattedNumber($value, $locale, $style) {
 		if ($value === null) {
-			return null;
+			return;
 		}
 
 		$localeToUse = !empty($locale) ? $locale : $this->getLocale();
@@ -149,7 +149,7 @@ protected function getFormattedNumber($value, $locale, $style) {
 	 */
 	protected function getFormattedCurrency($value, $locale = null, $currency = null) {
 		if ($value === null) {
-			return null;
+			return;
 		}
 
 		$localeToUse = !empty($locale) ? $locale : $this->getLocale();