From bdf7c687e46f9b05a2db3a450539484a649b3ef1 Mon Sep 17 00:00:00 2001
From: shagu <ericmauser@googlemail.com>
Date: Mon, 8 May 2017 21:15:30 +0200
Subject: [PATCH] api: do not proceed in backdrop code without frame

---
 api/api.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/api/api.lua b/api/api.lua
index ea70e418..25dcfd47 100644
--- a/api/api.lua
+++ b/api/api.lua
@@ -323,6 +323,9 @@ end
 -- 'legacy'     [bool]          use legacy backdrop instead of creating frames.
 -- 'transp'     [bool]          force default transparency of 0.8.
 function pfUI.api.CreateBackdrop(f, inset, legacy, transp)
+  -- exit if now frame was given
+  if not f then return end
+
   -- use default inset if nothing is given
   local border = inset
   if not border then