[PATCH] arping: Fix find_device_by_ifaddrs()

Look for another device if the device name and the currently found one are the
same, not different.

Also, make checking for the device's flags nonfatal.

Signed-off-by: Jan Synacek <redacted>
---
 arping.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arping.c b/arping.c
index ff77bec..d0edccf 100644
--- a/arping.c
+++ b/arping.c

@@ -550,10 +550,10 @@ static int find_device_by_ifaddrs(void)
 			continue;
 		if (ifa->ifa_addr->sa_family != AF_PACKET)
 			continue;
-		if (device.name && ifa->ifa_name && strcmp(ifa->ifa_name, device.name))
+		if (device.name && ifa->ifa_name && !strcmp(ifa->ifa_name, device.name))
 			continue;
 
-		if (check_ifflags(ifa->ifa_flags, device.name != NULL) < 0)
+		if (check_ifflags(ifa->ifa_flags, 0) < 0)
 			continue;
 
 		if (!((struct sockaddr_ll *)ifa->ifa_addr)->sll_halen)