[PATCH] msctf/tests: Return interface pointers instead of pointers to impl structure

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=25492

Your paranoid android.


=== w864 (64 bit inputprocessor) ===
inputprocessor.c:831: Test failed: Deactivation came unexpectedly