[dev] Not localized string

[Chuck Hagenbuch]

Quoting Federico Giannici <giannici@neomedia.it>:

> I have found a bug in compose.php that prevent a string to be localized.
> 
> Here is the diff against RELENG cvs of today:

Committed, thanks - I used a slightly different fix (using sprintf) to allow 
for different placement of the error message in translations.

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
"A dream which helps you to live your reality with dignity
 and justice is a good dream." - Tariq Ramadan