The ARB "LRP" instruction is a fragment program only instruction. It is
however valid in vs_2_0+ vertex shaders, so we have to emulate it.

riched20: If DataObjectImpl_EnumFormatEtc returns E_NOTIMPL then ensure that returned pointers are nulled.

The write mask sizes for the input and output semantics can be different,
resulting in compilation failure.

ole32: In simple create mode the size returned by IStream_Stat is actually the current stream position.

This avoids allocating them on the heap, and avoids the need for a
separate vtbl.

rpcrt4: Return the stack size from the ObjectStubless function so that the thunks are independent from the number of arguments.