vs2019编译masscan

修改两处地方

1、misc/string_s.h的58行改成如下代码

_MSC_VER >= 1900

image-20210419153211091

2、stubs/stub-lua.c改成如下代码：

    name = (void*(*)())GetProcAddress(lib, #name); \
    if (name == NULL) fprintf(stderr, "liblua: %s: failed\n", #name);

image-20210419153155490