Update cubetexture so that names constants instead of numeric
constants are used for the facetype and also add some additional
checks where facetype is passed as a parameter to the function.

Added support for opening devices directly with the server when they
don't correspond to a Unix file.

- Include the header file for the functions implemented in typegen.c.
- Generate proc format for FC_ERROR_STATUS_T type.

Zero initialize parameters in the generated code. Based on a patch by
Eric Kohl.

- Calculate the size of buffer required.
- Fix a typo.
- Set the buffer start and buffer end markers.

FC_SMALL is its own type and is the same size as FC_CHAR, not
FC_SHORT.

Output IDL wchar_t types as WCHAR to avoid conflicts with the
generally incompatible Unix wchar_t.

Adjust return code EAI_NODATA to WSAHOST_NOT_FOUND, like windows does
it.

convert_eai_u2w should map from unix to windows, not the other way
round (spotted by Dominic Wise).