[BUGFIX] Fix exception if initially no news are available in the overview

Classes/Controller/OverviewController.php

@@ -26,9 +26,9 @@ namespace SGalinski\SgNews\Controller;
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
-use SGalinski\SgNews\Service\HeaderMetaDataService;
 use SGalinski\SgNews\Domain\Model\Category;
 use SGalinski\SgNews\Domain\Model\News;
+use SGalinski\SgNews\Service\HeaderMetaDataService;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Extbase\Persistence\Generic\Query;
 
@@ -70,6 +70,10 @@ class OverviewController extends AbstractController {
 		/** @var News $highlightedNews */
 		$highlightedNews = $this->newsRepository
 			->findLastUpdatedOrHighlightedNewsByCategories(1, FALSE, $categoryIds)->getFirst();
+		if (!$highlightedNews) {
+			return;
+		}
+
 		/** @var Category $category */
 		$category = $this->categoryRepository->findByUid($highlightedNews->getPid());
 		$highlightedNewsMetaData = NULL;