user32: Also change rcUpdate when scrolling by more than the window size.

[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=23115

Your paranoid android.


=== wvistau64 (32 bit win) ===
win.c:8207: Test failed: WindowFromPoint returned 00040170, expected 000201FC
win.c:8214: Test failed: WindowFromPoint returned 000601BA, expected 000301FA