fix typo in format_article_labels()

diff --git a/include/functions.php b/include/functions.php
index f1e78dfb7730d34f6941c852530d556a4fc9daac..6337dbbdeb6617013a135fa194f911225fac5f32 100644 (file)
--- a/include/functions.php
+++ b/include/functions.php
@@ -3437,7 +3437,7 @@
 
        function format_article_labels($labels, $id) {
 
-               if (is_array($labels)) return '';
+               if (!is_array($labels)) return '';
 
                $labels_str = "";