[BUGFIX] Fix NewsByAuthors crashing when multiple authors are given

Fixes the plugin sgnews_newsbyauthor when more than one author is used.

Classes/Controller/NewsByAuthorController.php

@@ -79,25 +79,28 @@ class NewsByAuthorController extends AbstractController {
 		$categories = $newsMetaData = [];
 		$categoryRepository = $this->objectManager->get(CategoryRepository::class);
 		$excludedNewsIds = GeneralUtility::intExplode(',', $this->settings['excludedNews']);
-		foreach ($news as $newsEntry) {
-			/** @var News $newsEntry */
-			if (in_array($newsEntry->getUid(), $excludedNewsIds, TRUE)) {
-				continue;
-			}
-
-			$categoryId = $newsEntry->getPid();
-			if (!isset($categories[$categoryId])) {
-				$category = $categoryRepository->findByUid($categoryId);
-				if (!$category) {
+		foreach ($news as $newsResult) {
+			foreach ($newsResult as $newsEntry) {
+				/** @var News $newsEntry */
+				if (in_array($newsEntry->getUid(), $excludedNewsIds, TRUE)) {
 					continue;
 				}
 
-				$categories[$categoryId] = $category;
-			}
+				$categoryId = $newsEntry->getPid();
+				if (!isset($categories[$categoryId])) {
+					$category = $categoryRepository->findByUid($categoryId);
+					if (!$category) {
+						continue;
+					}
 
-			$newsMetaData[] = $this->getMetaDataForNews($newsEntry, $categories[$categoryId]);
+					$categories[$categoryId] = $category;
+				}
+
+				$newsMetaData[] = $this->getMetaDataForNews($newsEntry, $categories[$categoryId]);
+			}
 		}
 
+
 		$this->view->assign('newsMetaData', $newsMetaData);
 		$this->view->assign('authors', $authors);
 	}