Spotted by Michael Stefaniuc.

d3dxof: Do not print an error for interfaces that can be queried to retrieve the type of the object.

The check should be for all of the flags being set instead.

Logical and should have been used instead.

The calls fail with ERROR_INVALID_PARAMETER. Instead just call with a
zero size which performs the intended function.

Report the user as member of the admins group.

Based on a patch by Dmitry Timoshkov.

All this does so far is create a handle and store the credential type in there.

This isn't the prettiest way to merge those functions, but it's a start.

This gives a small performance improvement for applications that are
smart enough to set the D3DPRESENTFLAG_DISCARD_DEPTHSTENCIL flag, or
to create depth stencils with Discard set to TRUE.