[Bug 45320] cmd creates an environment variable with an empty name

https://bugs.winehq.org/show_bug.cgi?id=45320

--- Comment #13 from Jason Edmeades  ---
I started with trying that, then I deliberately didn't sort the count and
length when allocating the blocks, because I was concerned about the memcpy
where it takes the GetEnvironmentStrings (which includes the =C:) and copies it
into the allocated memory (len would be too short, and I didnt want the
performance hit of copying smaller chunks).

I think looking again, you would be correct that I can fix count, so
effectively you have an accurate size for the char * pointers, just leaving the
actual data copied in would still contain the =C: with no pointers to it. As
you say, it'll only save a few bytes, but its probably cleaner.