From 476ab9caea632883e6c1a17c0031b52fa607bb4b Mon Sep 17 00:00:00 2001
From: drfrag <drfrag666@hotmail.com>
Date: Fri, 12 Jun 2020 12:26:02 +0200
Subject: [PATCH] - Fixed: check for bad sidedefs was not taking into account
 sidedef compression.

---
 src/maploader/maploader.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index 961159590c7..1d008f6b344 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -1675,6 +1675,7 @@ void MapLoader::LoadLineDefs (MapData * map)
 		
 	auto mldf = map->Read(ML_LINEDEFS);
 	int numlines = mldf.Size() / sizeof(maplinedef_t);
+	int numsides = map->Size(ML_SIDEDEFS) / sizeof(mapsidedef_t);
 	linemap.Resize(numlines);
 
 	// [RH] Count the number of sidedef references. This is the number of
@@ -1743,7 +1744,7 @@ void MapLoader::LoadLineDefs (MapData * map)
 		// cph 2006/09/30 - fix sidedef errors right away.
 		for (int j=0; j < 2; j++)
 		{
-			if (LittleShort(mld->sidenum[j]) != NO_INDEX && mld->sidenum[j] >= Level->sides.Size())
+			if (LittleShort(mld->sidenum[j]) != NO_INDEX && mld->sidenum[j] >= numsides)
 			{
 				mld->sidenum[j] = 0; // dummy sidedef
 				Printf("Linedef %d has a bad sidedef\n", i);