comctl32/tests: Fix couple of metrics tests that fail on some systems

[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=12538

Your paranoid android.


=== w2003std (32 bit listview) ===
listview.c:5151: Test failed: NM_HOVER allow test: the msg sequence is not complete: expected 0087 - actual 0000
listview.c:5156: Test failed: NM_HOVER block test: the msg sequence is not complete: expected 0087 - actual 0000

=== w7u (32 bit listview) ===
listview.c:3914: Test failed: got right 112, bottom 19
listview.c:5151: Test failed: NM_HOVER allow test: the msg sequence is not complete: expected 0087 - actual 0000
listview.c:5156: Test failed: NM_HOVER block test: the msg sequence is not complete: expected 0087 - actual 0000

=== w8 (32 bit listview) ===
listview.c:5151: Test failed: NM_HOVER allow test: the msg sequence is not complete: expected 0087 - actual 0000
listview.c:5156: Test failed: NM_HOVER block test: the msg sequence is not complete: expected 0087 - actual 0000

=== w2008s64 (64 bit listview) ===
listview.c:5151: Test failed: NM_HOVER allow test: the msg sequence is not complete: expected 0087 - actual 0000
listview.c:5156: Test failed: NM_HOVER block test: the msg sequence is not complete: expected 0087 - actual 0000