From e290b8d0a0df8f10c33ded6a66639b584a19353d Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 23 Oct 2017 12:16:51 -0400
Subject: [PATCH] Fixed crash when duplicating PHYSFS_Io for zipfiles.
 (transplanted from 67ca4c4f043ecf050c395e767845733512c83de2)

---
 src/physfs_archiver_zip.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/physfs_archiver_zip.c b/src/physfs_archiver_zip.c
index 18249154..9972628f 100644
--- a/src/physfs_archiver_zip.c
+++ b/src/physfs_archiver_zip.c
@@ -455,6 +455,7 @@ static PHYSFS_Io *ZIP_duplicate(PHYSFS_Io *io)
     finfo->io = zip_get_io(origfinfo->io, NULL, finfo->entry);
     GOTO_IF_ERRPASS(!finfo->io, failed);
 
+    initializeZStream(&finfo->stream);
     if (finfo->entry->compression_method != COMPMETH_NONE)
     {
         finfo->buffer = (PHYSFS_uint8 *) allocator.Malloc(ZIP_READBUFSIZE);