Fixed php7_count to work with string value

include/utils/VtlibUtils.php

@@ -964,8 +964,8 @@ if (!function_exists('get_magic_quotes_gpc')) {
 }
 
 function php7_count($value) {
-	// PHP 8.x does not like count(null)
-	return is_null($value) ? 0 : count($value);
+	// PHP 8.x does not like count(null) or count(string)
+	return is_null($value) || !is_array($value) ? 0 : count($value);
 }
 
 ?>