From fbb536f4ad37e18327b0a547ad35ec1771b96a98 Mon Sep 17 00:00:00 2001
From: Simon Voordouw <simonvoordouw@gmail.com>
Date: Tue, 13 Jun 2017 11:10:50 +0200
Subject: [PATCH] use correct lua not equal

---
 src/rest/api/api_printer.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/rest/api/api_printer.lua b/src/rest/api/api_printer.lua
index 1463ab9..f328dd1 100644
--- a/src/rest/api/api_printer.lua
+++ b/src/rest/api/api_printer.lua
@@ -218,13 +218,13 @@ function M.fetch_POST(request, response)
 
 	local gcodeFiles = " "
 	local startCode = request:get("start_code")
-	if startCode != nil then
+	if not startCode then
 		gcodeFiles = gcodeFiles .. '/tmp/startcode '
 		io.open('/tmp/startcode', 'w+').write(startCode)
 	end
 
 	local endCode = request:get("end_code")
-	if endCode != nil then
+	if not endCode then
 		gcodeFiles = gcodeFiles .. '/tmp/endcode '
 		io.open('/tmp/endcode', 'w+').write(endCode)
 	end