From 0b23d3c0a7a116a19c14ae63b6281464ba1382a4 Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Mon, 30 Jan 2017 09:15:49 -0800
Subject: You can't just assume the start is always zero :/.

---
 apt-pkg/contrib/mmap.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index cb73fbc5d..f632cd6c5 100644
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -194,7 +194,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
    {
       if (SyncToFd != 0)
       {
-	 if (!SyncToFd->Seek(0) ||
+	 if (!SyncToFd->Seek(Start) ||
 	     !SyncToFd->Write (((char *)Base)+Start, Stop-Start))
 	    return false;
       }
-- 
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