mshtml: Fixed more test failures on win10.

[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=17770

Your paranoid android.


=== w1064 (32 bit htmldoc) ===
htmldoc.c:3569: Test failed: unexpected call IsErrorUrl