crtdll: Declare some variables static

[Andrew Talbot]

Robert Shearman wrote:

> 
> However, it had an implicit "... but they are exported from this DLL."
> 

Right. My brain has just caught up with you.

As you can see, I'm trawling through the dlls looking for anything I can
legitimately take out of the global namespace. I am trying to be as careful
as I can, and am unlikely to make the same mistake twice. But I ask people
to be patient with me if I stumble a bit.

I thought this patch might be questionable, but it just seemed easier to
publish it and have it rejected than to discuss it on wine-devel in
advance.

I'm definitely going to be more wary of functions that appear in spec files,
from now on.

Thanks to you and Marcus for your help.

-- Andy.