Looks like Win32 builds do not define THREADS. However, they're still

supporting threads, which means that th assertion is supperbly
dangerous, so make sure it's not compiled under Win32, period.

crypto/rand/md_rand.c

@@ -293,7 +293,7 @@ static void ssleay_rand_add(const void *buf, int num, double add)
 	    entropy += add;
 	if (!add_do_not_lock) CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 	
-#ifndef THREADS	
+#if !defined(THREADS) && !defined(WIN32)
 	assert(md_c[1] == md_count[1]);
 #endif
 	}