Handle case where inflateSync used when header never processed.
If zlib and/or gzip header processing was requested, but a header
was never provided and inflateSync was used successfully, then the
inflate state would be inconsistent, trying to compute a check
value but with no flags set. This commit sets the inflate mode to
raw in this case, since there is no other assumption that can be
made if a header was requested but never seen.
diff --git a/inflate.c b/inflate.c
index a4b5b68..575fcdf 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1433,6 +1433,8 @@
/* return no joy or set up to restart inflate() on a new block */
if (state->have != 4) return Z_DATA_ERROR;
+ if (state->mode == HEAD)
+ state->wrap = 0; /* never processed header, so assume raw */
in = strm->total_in; out = strm->total_out;
inflateReset(strm);
strm->total_in = in; strm->total_out = out;
