fix: SA: Fix "...Short ternary operator..." rule.

SA stands for Static Analysis.

src/Bundle/ChillDocStoreBundle/EntityRepository/DocumentCategoryRepository.php

@@ -34,6 +34,6 @@ class DocumentCategoryRepository extends EntityRepository
                 'SELECT MAX(c.idInsideBundle) + 1 FROM ChillDocStoreBundle:DocumentCategory c')
             ->getSingleResult();
 
-        return  $array_res[1] ?: 0;
+        return reset($array_res);
     }
 }