In windefs.c around 13 change to

FontSpec platform_default_fontspec(const char *name)
{
    FontSpec ret;
    if (!strcmp(name, "Font")) {
    strcpy(ret.name, "Fixedsys");
    ret.isbold = 0;
    ret.charset = ANSI_CHARSET;
    ret.height = 10;
    } else {
    ret.name[0] = '\0';
    }
    return ret;
}