[tz] question regarding 'timezone' variable

[Paul Eggert]

Kees Dekker wrote:
> Visual Studio 2015 has renamed timezone to _timezone (note the leading underscore). As a result, both strftime.c and localtime.c do not compile anymore.

Why doesn't localtime.c compile?  The variables have diffent names and so should 
not interfere with each other.  What's the error message?  Do you still get an 
error with the patch I proposed and have installed in the experimental version 
on Github?