cf. 6b0836e3.

To avoid returning non-aligned reserved regions.

And merge reported free areas.

../dlls/msi/dialog.c:4476:11: warning: attempt to call free on non-heap object 'hdr' [-Wfree-nonheap-object]
    free( &rec->hdr );
          ^

queue_task cannot free the struct because it doesn't know whether the
struct contains pointers to other dynamically allocated memory that also
needs to be freed (as is the case with struct send_request).

Signed-off-by: Bernhard Kölbl <besentv@gmail.com>

It's used by the function to find document content type. Fixes regression
introduced by e164b8ce.

Instead of including the IDLs directly, define a local IDL that #includes them,
with XAUDIO2_VER defined, and include that generated header.

Get rid of compat.c, and use XAUDIO2_VER to modify the code in the other source
files.

Build the tests for both xaudio2_7 and xaudio2_8 using PARENTSRC, and use
XAUDIO2_VER to select between them. This mirrors the approach taken for
d3dcompiler, and makes it easier to test more xaudio2 versions in the future.

Instead of going through the class factory.

When applying a new cursor clipping rect, or to the previous foreground
thread when foreground changes, to notify it of the cursor clipping rect
being reset.