From b4e8282023cb11659d1b785d3c010549c0ebfae5 Mon Sep 17 00:00:00 2001
From: Dirk Best <mail@dirk-best.de>
Date: Wed, 25 Oct 2017 13:13:54 +0200
Subject: [PATCH] dsk_dsk: Don't segfault on empty tracks (fixes einstein
 4game)

---
 src/lib/formats/dsk_dsk.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib/formats/dsk_dsk.cpp b/src/lib/formats/dsk_dsk.cpp
index 08f76c90127..493c503c223 100644
--- a/src/lib/formats/dsk_dsk.cpp
+++ b/src/lib/formats/dsk_dsk.cpp
@@ -398,6 +398,11 @@ bool dsk_format::load(io_generic *io, uint32_t form_factor, floppy_image *image)
 				continue;
 			track_header tr;
 			io_generic_read(io, &tr,track_offsets[(track<<1)+side],sizeof(tr));
+
+			// skip if there are no sectors in this track
+			if (tr.number_of_sector == 0)
+				continue;
+
 			desc_pc_sector sects[256];
 			uint8_t sect_data[65536];
 			int sdatapos = 0;