Fix warning on mingw32
Avoid this warning like other uses of setsockopt: /src/qemu/net/socket.c: In function 'net_socket_mcast_create': /src/qemu/net/socket.c:210: warning: passing argument 4 of 'setsockopt' from incompatible pointer type Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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@ -207,7 +207,8 @@ static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr
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/* If a bind address is given, only send packets from that address */
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if (localaddr != NULL) {
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ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, localaddr, sizeof(*localaddr));
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ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
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(const char *)localaddr, sizeof(*localaddr));
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if (ret < 0) {
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perror("setsockopt(IP_MULTICAST_IF)");
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goto fail;
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