[BUGFIX] Fix wrong previous/next news when using sorting instead of date

Classes/Domain/Repository/NewsRepository.php

@@ -392,7 +392,7 @@ class NewsRepository extends AbstractRepository {
 			'crdate' => QueryInterface::ORDER_DESCENDING
 		]);
 		return $query->matching(
-			$query->lessThan('sorting', $news->getSorting())
+			$query->greaterThan('sorting', $news->getSorting())
 		)->execute();
 	}
 
@@ -425,7 +425,7 @@ class NewsRepository extends AbstractRepository {
 			'crdate' => QueryInterface::ORDER_ASCENDING
 		]);
 		return $query->matching(
-			$query->greaterThan('sorting', $news->getSorting())
+			$query->lessThan('sorting', $news->getSorting())
 		)->execute();
 	}