i.e. they haven't been set yet or are clear.

Start of conformance tests for these Ds-calls.

code a bit.
Modify test case to demonstrate this.

Function always returns S_OK, even on failure.
Copy the file to the temp directory if the file exists but isn't found
by GetFileVersionInfoSize.
If bVersion is FALSE, return the language and code page identifiers of
the file, not the system.

Fix some places where a returned object was AddRef'd.
Make the search through implemented types work on all types, not just
interfaces.

oriented API (stack_get_current_symbol).
Reused the func name (stack_get_frame) for internal stack.c handling.

INTERNET_SendCallback where INTERNET_FLAG_ASYNC is already handled
properly.

parameter hack that native COM used to use (but not any more). Async
calls are an optimisation that we're not going to support in the near
future.

Copy VARDESC structures returned to calling applications instead of
passing a pointer to the master structure used internally.

file infos in NdrDllGetClassObject.

Replace references of pStubMsg->BufferEnd with RpcMsg->Buffer +
pStubMsg->BufferLength.
Fix buffer calculation when no interface data is marshaled to the
stream.

pStubMsg->BufferEnd being valid, because they aren't filled in when
using MIDL-generated server stubs.
Don't set the pointer to NULL on unmarshaling because we may want to
unmarshal the value to an existing pointer instead of allocating a new
one.

spotting that.)  Add a few more stubs.