Only not generate prefix when parameter is false

diff --git a/boot.php b/boot.php
index 0d26403bcb9a1f94317741e7b1313163b916fb1b..a329eec59aa85be40e9071db27df9755b40253c8 100644 (file)
--- a/boot.php
+++ b/boot.php
@@ -856,7 +856,7 @@ function check_addons(App $a)
 
 function get_guid($size = 16, $prefix = '')
 {
-       if (is_bool($prefix)) {
+       if (is_bool($prefix) && !$prefix) {
                $prefix = '';
        } elseif ($prefix == '') {
                $a = get_app();