avserver: Fix a bug where the socket is IPv4, but IPv6 is autoselected for the loopback address.

This fixes bind(8080): Address family not supported by protocol.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

avserver.c

@@ -522,6 +522,7 @@ static int socket_open_listen(struct sockaddr_in *my_addr)
     tmp = 1;
     setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
 
+    my_addr->sin_family = AF_INET;
     if (bind (server_fd, (struct sockaddr *) my_addr, sizeof (*my_addr)) < 0) {
         char bindmsg[32];
         snprintf(bindmsg, sizeof(bindmsg), "bind(port %d)", ntohs(my_addr->sin_port));