From c21121752d95ee241eb616a9b958fc662c874803 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@exmulti.com>
Date: Sun, 22 Apr 2012 13:59:24 -0400
Subject: [PATCH] CBlock::WriteToDisk() properly checks ftell(3) for error return

Rather than storing ftell(3)'s return value -- a long -- in an
unsigned int, we store and check a properly typed temp.  Then, assured a
non-negative value, we store in nBlockPosRet.
---
 src/main.h |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main.h b/src/main.h
index de674b5..e835cdd 100644
--- a/src/main.h
+++ b/src/main.h
@@ -961,9 +961,10 @@ public:
         fileout << FLATDATA(pchMessageStart) << nSize;
 
         // Write block
-        nBlockPosRet = ftell(fileout);
-        if (nBlockPosRet == -1)
+        long fileOutPos = ftell(fileout);
+        if (fileOutPos < 0)
             return error("CBlock::WriteToDisk() : ftell failed");
+        nBlockPosRet = fileOutPos;
         fileout << *this;
 
         // Flush stdio buffers and commit to disk before returning
-- 
1.7.1