[winswitch] Scrolling with mouse wheel not working

[Lukas Haase]

Hi,

When I use my mouse wheel, the up direction seems to be ignored, scrolling down works.
An easy way to reproduce is to start midnight commander (mc) in xterm and go into a large directory. I can scroll down with my mouse wheel but not up.

Is this some known issue or an unknown bug?

In case it matters: I use xpra client 1.0 (14502) under Win 10 and xpra v1.0.1-r14734 under CentOS 5.

Thanks!
Luke