FIX Checcking if related article to avoid warnings

template-parts/revues/table-matiere-revue.php

@@ -7,6 +7,7 @@ $issue_related_articles = get_field('articles', $revueID);
 <section class="table-matieres">
 	<h3 class="content-tab__title">Table des matières</h3>
 	<ul class="post-grid__list article-grid__list">
+		<?php if ($issue_related_articles && is_array($issue_related_articles)) : ?>
 			<?php foreach ($issue_related_articles as $article) : ?>
 				<?php get_template_part('template-parts/articles/card-article', null, array(
 
@@ -17,5 +18,6 @@ $issue_related_articles = get_field('articles', $revueID);
 					'showAuthors' => true,
 				)); ?>
 			<?php endforeach; ?>
+		<?php endif; ?>
 	</ul>
 </section>