Use Windows randomness code on Cygwin

CHANGES

@@ -763,6 +763,9 @@
 
  Changes between 0.9.7e and 0.9.7f  [XX xxx XXXX]
 
+  *) Use Windows randomness collection on Cygwin.
+     [Ulf Möller]
+
   *) Fix hang in EGD/PRNGD query when communication socket is closed
      prematurely by EGD/PRNGD.
      [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]

crypto/rand/rand_win.c

@@ -113,7 +113,7 @@
 #include <openssl/rand.h>
 #include "rand_lcl.h"
 
-#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN32_CYGWIN)
 #include <windows.h>
 #ifndef _WIN32_WINNT
 # define _WIN32_WINNT 0x0400
@@ -680,7 +680,7 @@ static void readtimer(void)
 
 static void readscreen(void)
 {
-#ifndef OPENSSL_SYS_WINCE
+#if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN)
   HDC		hScrDC;		/* screen DC */
   HDC		hMemDC;		/* memory DC */
   HBITMAP	hBitmap;	/* handle for our bitmap */