bug#19473: posn-at-point fails in RTL paragraph

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Date: Tue, 30 Dec 2014 17:31:53 +0100
> 
> posn-at-point returns the wrong position in RTL paragraphs.  For
> example, when visiting TUTORIAL.he, (= (event-start (posn-at-point)
> (point))) returns nil everywhere.
> 
> That appears to be because pos-visible-in-window-p returns (0 0) for
> (point-min) even though the RTL paragraph is aligned to the right.

Thanks for the report and the analysis.  I fixed this in commit
aa472a3 on the emacs-24 branch.

For the record: this never worked correctly for RTL text.