From b80664316e2f37e43b452772cd1dceb26593e2fd Mon Sep 17 00:00:00 2001
From: Clemens Lang <neverpanic@gmail.com>
Date: Sun, 19 Feb 2012 00:37:13 +0100
Subject: [PATCH] Don't set yk_errno if nothing went wrong

This fixes a superfluous warning when using challenge-response
authentication with yubico-pam on OS X:
	debug: pam_yubico.c:649 (do_challenge_response): USB error: USB error
This warning appeared although no error actually occured.
---
 ykcore/ykcore_osx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ykcore/ykcore_osx.c b/ykcore/ykcore_osx.c
index 58e3bd2..7d343a0 100644
--- a/ykcore/ykcore_osx.c
+++ b/ykcore/ykcore_osx.c
@@ -121,7 +121,8 @@ void *_ykusb_open_device(int vendor_id, int product_id)
 			yk_release();
 			return 0;
 		}
-		
+
+		yk_errno = 0;
 		return yk;
 	}
 	
-- 
2.39.5