BUG #15167: error C2365: 'errcode' : redefi nition;previous definition

The following bug has been logged on the website:

Bug reference:      15167
Logged by:          Hao LI
Email address:      mixtrue@gmail.com
PostgreSQL version: 10.3
Operating system:   windows 7
Description:        

Platform: windows 7 and vs 2008 

The source code checkout from : https://github.com/postgres/postgres.git.
and the git log as following:
commit 9cad926eb876a30d58a5b39789098da83a6ef91c

I run the command from src\tools\msvc\build.pl DEBUG, and get error as
following: 

d:\work\postgres\src\include\utils/elog.h(131): error C2365: 'errcode' :
redefinition; previous definition was 'typedef'.

Best Regards, 

Hao.