From c7cfc06285ce0b71cf31dd917663b10e7fe4ac89 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Tue, 14 Jan 2020 19:18:18 +0100
Subject: [PATCH] Added a NULL pointer check to zip_bus_speed().

---
 src/disk/zip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/disk/zip.c b/src/disk/zip.c
index 60c775810..5e0b63c77 100644
--- a/src/disk/zip.c
+++ b/src/disk/zip.c
@@ -859,7 +859,7 @@ zip_bus_speed(zip_t *dev)
 {
     double ret = -1.0;
 
-    if (dev->drv->bus_type == ZIP_BUS_SCSI) {
+    if (dev && dev->drv && dev->drv->bus_type == ZIP_BUS_SCSI) {
 	dev->callback = -1.0;	/* Speed depends on SCSI controller */
 	return 0.0;
     } else {