- do unity data status bar correction only if stbar is in an iwad

src/d_main.cpp

@@ -2967,8 +2967,21 @@ static void FixUnityStatusBar()
 	if (gameinfo.flags & GI_ALWAYSCENTERSBAR)
 	{
 		FGameTexture* sbartex = TexMan.FindGameTexture("stbar", ETextureType::MiscPatch);
+
+		// texture not found, we're not here to operate on a non-existent texture so just exit
 		if (!sbartex)
 			return;
+
+		// where is this texture located? if it's not in an iwad, then exit
+		int lumpnum = sbartex->GetSourceLump();
+		if (lumpnum >= 0 && lumpnum < fileSystem.GetNumEntries())
+		{
+			int wadno = fileSystem.GetFileContainer(lumpnum);
+			if (!(wadno >= fileSystem.GetIwadNum() && wadno <= fileSystem.GetMaxIwadNum()))
+				return;
+		}
+
+		// only adjust offsets if none already exist
 		if (sbartex->GetTexelWidth() > 320 &&
 			!sbartex->GetTexelLeftOffset(0) && !sbartex->GetTexelTopOffset(0))
 		{

wadsrc_extra/static/iwadinfo.txt

@@ -348,6 +348,7 @@ IWad
 		          "E3M1","E3M2","E3M3","E3M4","E3M5","E3M6","E3M7","E3M8","E3M9",
 		          "DPHOOF","BFGGA0","HEADA1","CYBRA1","SPIDA1D1", "E4M2",
 		          "DMENUPIC"
+	Load = "extras.wad", "soundtrack"
 	BannerColors = "00 7c 00", "a8 a8 a8"
 	IgnoreTitlePatches = 1
 	AlwaysCenterStatusbar = 1
@@ -512,7 +513,7 @@ IWad
 	MustContain = "MAP01", "DMENUPIC"
 	BannerColors = "00 7c 00", "a8 a8 a8"
 	IgnoreTitlePatches = 1
-	Load = "nerveunity.wad"
+	Load = "nerveunity.wad", "extras.wad", "soundtrack"
 	AlwaysCenterStatusbar = 1
 }