It was just pointed out to me that it's better to cast to double...

crypto/rand/md_rand.c

@@ -315,7 +315,7 @@ static void ssleay_rand_add(const void *buf, int num, double add)
 
 static void ssleay_rand_seed(const void *buf, int num)
 	{
-	ssleay_rand_add(buf, num, (float)num);
+	ssleay_rand_add(buf, num, (double)num);
 	}
 
 static int ssleay_rand_bytes(unsigned char *buf, int num)

crypto/rand/rand_unix.c

@@ -233,7 +233,7 @@ int RAND_poll(void)
 #if defined(DEVRANDOM) || defined(DEVRANDOM_EGD)
 	if (n > 0)
 		{
-		RAND_add(tmpbuf,sizeof tmpbuf,(float)n);
+		RAND_add(tmpbuf,sizeof tmpbuf,(double)n);
 		OPENSSL_cleanse(tmpbuf,n);
 		}
 #endif