slirp: fix structure initialization in tcp_listen() A data structure of type sockaddr_in is allocated from stack but not properly initialized. This may lead to a failure in the bind() call later on. Fixed by filling the contents of the structure with zeroes before using it. Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>