bug#10165: [PATCH] Allow setting corner in mouse avoidance mode.

[Juri Linkov]

>>   x-side     `left' or `right'
>>   y-side     `top' or `bottom'
>>   x-offset   integer (positive, negative or zero)
>>   y-offset   integer (positive, negative or zero)
>
> Note that the code I wrote don't require negative arguments.
> You just set the distance from one edge with a positive argument,
> doesn't matter if it is right, left top or bottom.

Sorry, I don't understand.  Could you please demonstrate how it would be
possible to represent the following setting:

  (defun mouse-avoidance-banish-destination ()
    (cons (+ 3 (frame-width)) (- (frame-height) 1)))

with only positive integer values in `mouse-avoidance-banish-position'?