[Patch 3/3] MdeModulePkg/DxeNetLib: Fix an error in packet length counting.

[fanwang2 <fan.wang@intel.com>]

From: Wang Fan <fan.wang@intel.com>

* In old implementation, the operation len-- assumes AsciiSPrint()
  has counted NULL terminator, and it's not correct. This patch is
  to fix this issue.

Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wang Fan <fan.wang@intel.com>
---
 MdeModulePkg/Library/DxeNetLib/DxeNetLib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/MdeModulePkg/Library/DxeNetLib/DxeNetLib.c b/MdeModulePkg/Library/DxeNetLib/DxeNetLib.c
index 90f17b7..cbce28f 100644
--- a/MdeModulePkg/Library/DxeNetLib/DxeNetLib.c
+++ b/MdeModulePkg/Library/DxeNetLib/DxeNetLib.c
@@ -401,22 +401,21 @@ SyslogBuildPacket (
                     Time.Day,
                     Time.Hour,
                     Time.Minute,
                     Time.Second
                     );
-  Len--;
 
   Len += (UINT32) AsciiSPrint (
                     Buf + Len,
                     BufLen - Len,
                     "Tiano %a: %a (Line: %d File: %a)",
                     Module,
                     Message,
                     Line,
                     File
                     );
-  Len--;
+  Len ++;
 
   //
   // OK, patch the IP length/checksum and UDP length fields.
   //
   Len           += sizeof (EFI_UDP_HEADER);
-- 
1.9.5.msysgit.1