Socket leak on each call to qemu_socket()

On any host platform where SOCK_CLOEXEC is defined (Linux at least), a socket is leaked on each call to qemu_socket() AND the socket returned hasn't been created with the desired SOCK_CLOEXEC attribute.  The qemu_socket routine is:

Line 272 of util/osdep.c:
/*
 * Opens a socket with FD_CLOEXEC set
 */
int qemu_socket(int domain, int type, int protocol)
{
    int ret;

#ifdef SOCK_CLOEXEC
    ret = socket(domain, type | SOCK_CLOEXEC, protocol);
    if (ret != -1 || errno != EINVAL) {
        return ret;
    }
#endif
    ret = socket(domain, type, protocol);
    if (ret >= 0) {
        qemu_set_cloexec(ret);
    }

    return ret;
}