pimd: When bind fails we could leave an open socket

Clean up the rare situation when bind fails to not
close the fd that was just opened and have the socket
leaked.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

pimd/pim_igmp.c

@@ -1013,6 +1013,8 @@ struct igmp_sock *pim_igmp_sock_add(struct list *igmp_sock_list,
 	if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
 		zlog_warn("Could not bind IGMP socket for %s on %s",
 			  inet_ntoa(ifaddr), ifp->name);
+		close(fd);
+
 		return NULL;
 	}