Re: scroll-conservatively overflow

[Richard Stallman]

    > That used to work; now it doesn't (although I'm not sure it is because
    > of a recent change or I just took a time to notice), because
    > scroll-conservatively gets multiplied by FRAME_LINE_HEIGHT (f) in a
    > couple of places, and that causes an overflow.

    That change was made almost a year ago...

Multiplying by FRAME_LINE_HEIGHT is right in principle, but the
overflow is a bug.  Perhaps we should use long long for that
multiplication, and if the result is bigger than the largest positive
integer, reduce it to the largest positive integer.