commit 89245c0a84eac0c5cfc6f0eb2fe72854f4b2c9e6
author Mark Adler <madler@alumni.caltech.edu> Thu Mar 30 14:48:43 2017 -0700
committer Mark Adler <madler@alumni.caltech.edu> Thu Mar 30 14:48:43 2017 -0700
tree 333f173ff6f35c70228b0b8c9eebf2d2d30b1aab
parent be5e3647c4aca626dcfa833ae2455b7af21b60b3

Don't compute check value for raw inflate if asked to validate.

inflate.c

diff --git a/inflate.c b/inflate.c
index ac333e8..a4b5b68 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1531,7 +1531,7 @@
 
     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;