LIBWGET_EXPORT must be preceed the prototypes to work on Windows (MSVC)
Currently we have
void
wget_millisleep(int ms) LIBWGET_EXPORT;
but to compile on Windows it must be
LIBWGET_EXPORT void
wget_millisleep(int ms);
Currently I added checking for LIBWGET_STATIC to define LIBWGET_EXPORT to be empty. Thanks to Gisle Vanem for his suggestion.