This fixes the windows build. For some reason, MSVC believes that the
actor-compiled version of networkSender actually exists, but the
non-actor-compiled version doesn't exist.
This is a hackish workaround, as the largest reason to not include a
.g.h file is because it defines a POST_ACTOR_COMPILER define that messes
with actorcompiler.h's #defines. We can just undefine that after
including the file. ...but carefully.
This introduces a new rule in our codebase, that any file that #includes
actorcompiler.h needs to do it as the last #include, and it needs to
then #include unactorcompiler.h at the end of the file.
The point of this is that it prevents our actorcompiler.h #defines from
leaking into boost or the c++ standard library. Both of these start
throwing errors if you s/state// their code, which `#define state `
effectively does.