[PATCH 2/3] ddraw/tests: Don't use log2f to avoid mingwex dependency.

[Marvin]

Hi,

While running your changed tests, 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=63759

Your paranoid android.


=== w1064v1809_2scr (32 bit report) ===

ddraw:
ddraw1.c:11113: Test failed: Got unexpected color 0x00ffffff.

=== w8adm (32 bit report) ===

ddraw:
0d00:ddraw2: unhandled exception c0000005 at 6A223599

=== wvistau64 (32 bit report) ===

ddraw:
0910:ddraw4: unhandled exception c0000005 at 74196143

=== wvistau64 (64 bit report) ===

ddraw:
06e4:ddraw4: unhandled exception c0000005 at 000007FEF6301883

=== wvistau64 (32 bit report) ===

ddraw:
0914:ddraw7: unhandled exception c0000005 at 73DE6145

=== w8 (task log) ===

Task errors:
TestBot process got stuck or died unexpectedly
The previous 1 run(s) terminated abnormally

=== wvistau64 (64 bit report) ===

ddraw:
0284:ddraw7: unhandled exception c0000005 at 000007FEF6301883