bittorrent/libutp — pull request #65 by mikedld (2014-06-15 06:34:18+00:00)
Title: Use _WIN32 instead of WIN32 to check for Windows

MinGW defines both _WIN32 and WIN32 (and may even be the only compiler
doing so). Microsoft and Intel compilers only define _WIN32. Use the
common one to eliminate the need in defining WIN32 explicitly.