bug#16647: Imprecisions with window-resizing cursors

[martin rudalics]

> I didn't read this thread attentively enough -- could you tell what
> problem are you trying to solve?  If I know the answer,  I will be
> happy to help.

Thanks for the offer.  The mouse glyph code was pretty broken (I suppose
already for quite some time) but I hopefully now fixed most issues.

If you are good at this - I need a function like XDrawRectangle with the
same signature but for debugging with the Windows API.  It would take me
at least an hour to write it.  Could you do that?

martin