Fix cross-compiling to MinGW on Unix
"windows.h" must be lowercase on case-sensitive file systems.
/********************************* WINDOWS ********************************/
#if (defined(CHY_HAS_WINDOWS_H) && defined(CHY_HAS_PROCESS_H) && !defined(__CYGWIN__))
-#include <Windows.h>
+#include <windows.h>
#include <process.h>
int
