bug#9541: mouse-1 inside scroll-margin causes undesirable region activation

[Le Wang]

Repro:

1. emacs -Q
2. eval:

  (setq scroll-margin 5)

3. open some multi-page file
4. left-click in bottom margin (bottom 5 lines)

Notice region is selected and active.

This problem is noted here: http://www.emacswiki.org/emacs/SmoothScrolling

A package attempts to solve it here:
http://adamspiers.org/computing/elisp/smooth-scrolling.el

But the bug is in Emacs.

-- 
Le