bug#971: 23.0.60; next-line, previous-line and goal-column

["Roland Winkler" <Roland.Winkler@physik.uni-erlangen.de>]

When goal-column has a value larger than the window width, next line
and previous-line behave oddly. Visit file foo.txt, choose a window
width of, say, 40, and set goal-column to 50. If initially point is
at the beginning of line, next-line and previous-line put point in a
column smaller than goal-column. Executing next-line again puts
point at the end of the line past goal-column.  

Results also behave on the value of truncate-lines. The above refers
to truncate-lines being t. If it is nil, previous-line doesn't do
anything for me. (It does not move point backwards.)

There is no such problem with emacs 22.2.

cat > foo.txt << EOF
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar |
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar |
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar |
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar |
| foo bar | foo bar | foo bar | foo bar | foo bar | foo bar | foo bar
EOF

In GNU Emacs 23.0.60.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.10.6)
 of 2008-09-07 on lukas