[PATCH v3 6/6] wmphoto: Implement WmpDecoder using jxrlib.

[Esme Povirk (they/them)]

Fixed my issue with the old dll being used and now I get this:
d3dx10.c:1380: Test succeeded inside todo block: Test 27: Got unexpected hr 0.

It seems like wmp_stream_Read doesn't report the actual number of
bytes read to the caller. How is it meant to report a short read?

I didn't realize you had a FIXME for multi-frame images elsewhere, we
only need to report it once.