Disable warning C4200 on VC++

- This warning is about using zero-sized arrays in structs (aka flexible
  member arrays). It's standard-enough for our purposes, so don't warn
  about it, since neither GCC nor Clang do.
Redo GME warning-silencing that was undone by commit fbddfbe57
Add new GME files to VC++ 2005 project
We're building GME static, so don't do any DLL magic on Win32
Remove more VC++ warnings