Preprocess.cmd returns %errorlevel%.

ReFreezed · ReFreezed · commit 6ce2ab25c822 · 2020-08-10T18:47:02.000+02:00
diff --git a/Preprocess.cmd b/Preprocess.cmd
@@ -1 +1,2 @@
 @lua "%~dp0preprocess-cl.lua" %*
+@EXIT /B %ERRORLEVEL%
