[10/11] msi/tests: Prepare msi.c for the switch to -D__WINESRC__.

[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://newtestbot.winehq.org/JobDetails.pl?Key=2769

Your paranoid android.


=== wvista (32 bit msi) ===
The test timed out

=== w2008s64 (32 bit msi) ===
The test timed out

=== w7pro64 (32 bit msi) ===
Timeout

=== w2008s64 (64 bit msi) ===
Timeout

=== w7pro64 (64 bit msi) ===
Timeout