From d94f682c707bb0c98982469bb15aa76b704d1dc0 Mon Sep 17 00:00:00 2001
From: Richard Bateman <taxilian@gmail.com>
Date: Fri, 24 Jun 2011 15:21:27 -0600
Subject: [PATCH] Fixed possible mac when unplugging a device during
 enumeration

---
 mac/hid.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mac/hid.c b/mac/hid.c
index 017a78f..9dbaaed 100644
--- a/mac/hid.c
+++ b/mac/hid.c
@@ -320,6 +320,9 @@ struct hid_device_info  HID_API_EXPORT *hid_enumerate(unsigned short vendor_id,
 
 		IOHIDDeviceRef dev = device_array[i];
 
+        if (!dev) {
+            continue;
+        }
 		dev_vid = get_vendor_id(dev);
 		dev_pid = get_product_id(dev);