fix_truncate with empty string

library/templates/Intonation/Library/View/Wrapper/Abstract.php

@@ -194,7 +194,7 @@ abstract class Intonation_Library_View_Wrapper_Abstract {
   protected function _truncate($text): string
   {
     $number_of_word = ($this->_widget_context && null !== ($description_length = $this->_widget_context->getDescriptionLength()))
-      ? $description_length
+      ? (int) $description_length
       : ZendAfi_View_Helper_Template_TruncateList::AJAX_SIZE;
 
     return $this->_view->truncate($text,