Compiling 'os_structs.c'

Using 'odin32ex' commit: "Definition of a bunch of typedefs and defines"
https://github.com/rousseaux/odin32ex/commit/a057d89ac992e6c918ef00c69b9ae543510a823f
Compiling 'os_structs.c' -- succes!

Using 'odin32ex' commit: "Nameless Unions/Structs support and ... (*)"
https://github.com/rousseaux/odin32ex/commit/30b40a0ab51e58761faf8a766615eb9afcddca2d

Note:
  Some Odin32 structures were replaced with Wine versions to accomodate
  missing members. These structures have a different size than the
  original Odin32 structures. So, at a later stage a rebuild of Odin
  is needed with these modified headers.