From 89245c0a84eac0c5cfc6f0eb2fe72854f4b2c9e6 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Thu, 30 Mar 2017 14:48:43 -0700
Subject: [PATCH] Don't compute check value for raw inflate if asked to
 validate.

---
 inflate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inflate.c b/inflate.c
index ac333e8..a4b5b68 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1531,7 +1531,7 @@ int check;
 
     if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
     state = (struct inflate_state FAR *)strm->state;
-    if (check)
+    if (check && state->wrap)
         state->wrap |= 4;
     else
         state->wrap &= ~4;