Simplify redisplay-x/separate_textual_runs

[Stephen J. Turnbull]

Olivier Galibert writes:
 > On Sun, Apr 01, 2007 at 11:53:12PM +0900, Stephen J. Turnbull wrote:

 > > That said, there are two issues that I'd like insight into (no effect
 > > on your patch, as they apply to the original version too).  (They're
 > > flagged with #### in the patch below.)
 > > 
 > > 1.  I wonder if there might be efficiency implications to the
 > >     alignment of text_storage, since in many cases we'll be storing
 > >     shorts or integers into it.
 > 
 > Or correctness even.  I don't know is libXft is unaligned-resistant.

You mean on platforms where you get bus errors if the alignment of an
access is incorrect?  Urk.  OK, I'll leave the #### there.

 > > Also, I'd like to suggest the patch below (to be applied *on top of*
 > > your patch).

 > I like it.

OK, I think you can apply your patch, and once I've negotiated some
wording with Aidan, I plan to apply mine.