ssize_t redefinition on Windows - int/int64 vs long/long long (#1337)
ssize_t redefinition on Windows - int/int64 vs long/long long (#1337)

* ssize_t redefinition on Windows - int/int64 vs long/long long

* Define ssize_t as __int64 for _WIN64, not long long

Co-authored-by: iamttaM <b65cfe84b2b8decbc27cc1a03866d0e3cca6cc85@users.noreply.github.com>
yhirose/cpp-httplib,yhirose/cpp-httplib,yhirose/cpp-httplib,yhirose/cpp-httplib