Add windows.h to pickup GetLastError, etc.

diff --git a/include/fcgios.h b/include/fcgios.h
index 4b1337e..80fe006 100755 (executable)
--- a/include/fcgios.h
+++ b/include/fcgios.h
@@ -24,11 +24,14 @@
 #include <sys/time.h>
 #endif
 
+#ifdef HAVE_WINDOWS_H
+#include <windows.h>
+#endif
+
 #if defined (c_plusplus) || defined (__cplusplus)
 extern "C" {
 #endif
 
-
 #ifdef _WIN32
 #define OS_Errno GetLastError()
 #define OS_SetErrno(err) SetLastError(err)