sha256_4way: do not include unnecessary headers, when !4way Reported by lfm
diff --git a/sha256_4way.c b/sha256_4way.c
index f91bb0f..5ffe1c8 100644
--- a/sha256_4way.c
+++ b/sha256_4way.c
@@ -4,15 +4,16 @@
// tcatm's 4-way 128-bit SSE2 SHA-256
+#include "miner.h"
+
+#ifdef WANT_SSE2_4WAY
+
#include <string.h>
#include <assert.h>
#include <xmmintrin.h>
#include <stdint.h>
#include <stdio.h>
-#include "miner.h"
-
-#ifdef WANT_SSE2_4WAY
#define NPAR 32