[4/4] mshtml: Add IDispatchEx support to IXMLHTTPRequest

[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
http://testbot.winehq.org/JobDetails.pl?Key=9250

Your paranoid android.


=== W2KPROSP4 (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== WXPPROSP3 (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== W2K3R2SESP2 (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== WVISTAADM (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== W2K8SE (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== W7PRO (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== W7PROX64 (32 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002

=== W7PROX64 (64 bit domdoc) ===
domdoc.c:3449: Test failed: ret 80004002