Merged revisions 69260 via svnmerge from

Merged revisions 69260 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r69260 | thomas.heller | 2009-02-03 18:07:40 +0100 (Di, 03 Feb 2009) | 9 lines

  This refactoring should make it easier to add new calling conventions.

  Replace ffi_call_STDCALL and ffi_call_SYSV by a ffi_call_x86 function
  that cleans up the stack when FFI_SYSV is used, and does nothing for
  FFI_STDCALL.

  Remove libffi_msvc\win32.S, which is out of date and also unused; it
  was only used for building ctypes with the MingW compiler.
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