From 1636ddc00ea8658ca4d90c78031c76d7e9b0b8c6 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Mon, 31 May 2021 21:19:29 +0200
Subject: [PATCH] - set the main resource file's index in the file system.

Some checks need this.
---
 source/core/initfs.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/core/initfs.cpp b/source/core/initfs.cpp
index 8c5b7da92..3c1d3e473 100644
--- a/source/core/initfs.cpp
+++ b/source/core/initfs.cpp
@@ -339,6 +339,7 @@ void InitFileSystem(TArray<GrpEntry>& groups)
 		}
 		i--;
 	}
+	fileSystem.SetIwadNum(1);
 	fileSystem.SetMaxIwadNum(Files.Size() - 1);
 
 	D_AddConfigFiles(Files, "Global.Autoload", "*.grp", GameConfig);