- uncoupled the decompressors from ZDoom's internal error handling.

This code made it hard to repurpose this code for other tools, so now the error handler must be passed as a callback to OpenDecompressor.

src/m_misc.cpp

@@ -656,32 +656,3 @@ UNSAFE_CCMD (screenshot)
 		G_ScreenShot (argv[1]);
 }
 
-//
-// M_ZlibError
-//
-FString M_ZLibError(int zerr)
-{
-	if (zerr >= 0)
-	{
-		return "OK";
-	}
-	else if (zerr < -6)
-	{
-		FString out;
-		out.Format("%d", zerr);
-		return out;
-	}
-	else
-	{
-		static const char *errs[6] =
-		{
-			"Errno",
-			"Stream Error",
-			"Data Error",
-			"Memory Error",
-			"Buffer Error",
-			"Version Error"
-		};
-		return errs[-zerr - 1];
-	}
-}