From ba6dfe0bbb454a41c1c1ad8a29238925b1927980 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@symas.com>
Date: Fri, 12 Jul 2013 12:53:35 -0700
Subject: [PATCH] Fix env_read_header() on Windows

Commit d6d2638acc245116b8f091ac425b6700d06c4713 broke read
on zero-length files.
---
 libraries/liblmdb/mdb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 0ba5e2d..b186ba7 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2487,6 +2487,8 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta)
 		memset(&ov, 0, sizeof(ov));
 		ov.Offset = off;
 		rc = ReadFile(env->me_fd,&pbuf,MDB_PAGESIZE,&len,&ov) ? (int)len : -1;
+		if (rc == -1 && ErrCode() == ERROR_HANDLE_EOF)
+			rc = 0;
 #else
 		rc = pread(env->me_fd, &pbuf, MDB_PAGESIZE, off);
 #endif