[Bug 50097] comctl32:monthcal fails on Wednesdays!!!

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50097

--- Comment #1 from Nikolay Sivov  ---
It's probably because of this logic:

mchit.pt.x = rc.right / 2;
mchit.pt.y = rc.bottom / 2;

So the day in the fourth column is used initially, which happens to be either
Wednesday or Thursday in practice. Later test tries to fix that up by adjusting
'y' in a loop, that evidently does not work very well. It's also possible that
while original pt.y does point to valid column, pt.x might miss valid day
rectangle, failing initial hittesting.