definition for _attribute() in remote.c

Hi,

I'm looking at getting Git for Windows to compile via Visual Studio 
(https://github.com/git-for-windows/git/pull/256).

However the use of __attribute() in remote.c at L1662 
(https://github.com/git-for-windows/git/blob/master/remote.c#L1662) has got 
me confused in that I can't see how the regular definition of __attribute() 
is #included in this case. A definition is given in 
git\compat\regex\regex_internal.h but doesn't appear to be on remote.c's 
include path.

The line was introduced by 3a429d0 (remote.c: report specific errors from 
branch_get_upstream, 2015-05-21) which appears to be later than the previous 
MSVC testers had looked at.

Any guidance on what is happening in this case would be welcomed as this is 
the last compile error I'm seeing.

--

Philip