Merge branch 'cherry-pick-21a31f8f' into 'next-3.x'

fix: correctly check if translation of unit exists

See merge request !151

src/QUI/ERP/Accounting/Article.php

@@ -567,7 +567,7 @@ public function getQuantityUnit(QUI\Locale $Locale = null): string
             if (isset($options['entries'][$unitId])) {
                 $titles = $options['entries'][$unitId]['title'];
 
-                if ($titles[$current]) {
+                if (!empty($titles[$current])) {
                     return $titles[$current];
                 }
             }