From 50e440f081a0edc293dcfe7333a91d764e3d15cd Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Mon, 26 Sep 2011 18:20:32 -0700
Subject: [PATCH] Allow gzrewind() and gzseek() after a premature end-of-file.

---
 gzlib.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gzlib.c b/gzlib.c
index e8cb479..c59bcda 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -265,7 +265,8 @@ int ZEXPORT gzrewind(file)
     state = (gz_statep)file;
 
     /* check that we're reading and that there's no error */
-    if (state->mode != GZ_READ || state->err != Z_OK)
+    if (state->mode != GZ_READ ||
+            (state->err != Z_OK && state->err != Z_BUF_ERROR))
         return -1;
 
     /* back up and start over */
@@ -293,7 +294,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
         return -1;
 
     /* check that there's no error */
-    if (state->err != Z_OK)
+    if (state->err != Z_OK && state->err != Z_BUF_ERROR)
         return -1;
 
     /* can only seek from start or relative to current position */
-- 
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