issue: iFrame On Install

This addresses the "Call to getAllowIframes() on NULL" error on installation pages. This is due to 4781 that introduced the concept of allowing multiple iFrames, where we are not checking for `$cfg` before calling the method. This adds a check for `$cfg` so the errors do not occur.

issue: iFrame On Install
e7a7e3b0 · JediKev · 4a0e1bc3 · e7a7e3b0
Commit e7a7e3b0 authored 6 years ago by JediKev
--- a/setup/inc/header.inc.php
+++ b/setup/inc/header.inc.php
 <?php
-header("Content-Security-Policy: frame-ancestors '".$cfg->getAllowIframes()."';");
+if ($cfg)
+    header("Content-Security-Policy: frame-ancestors '".$cfg->getAllowIframes()."';");
 ?>
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">