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

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

--- Comment #18 from Jason Edmeades  ---
Glad it sorts out the problem, and thanks for the windows testing.

My gut feeling is go with what we have (so char** array doesn't point to them
but they are actually in the space allocated for the environ but not
referenceable unless you walk the environ explicitly) until we find an app that
will care. Anyone walking the char** array wont see them, and whether there are
gaps or not seems an implementation detail not exposed to the user through
normal API means.