ruby/ruby — pull request #433 by kou1okada (2013-10-29 08:30:11+00:00)
Title: Unnecessary declaration. It's maybe OBSOLETE.

1. This source code already included "windows.h", therefore it's already declared:
WINBASEAPI DWORD WINAPI GetLastError (VOID);
2. At cygwin64, still sizeof(DWORD) is 4, but sizeof(unsigned long) is 8, it make confliction.