[scribus] Fit photograph to frame

[ale rimoldi]

hey christian

> Bug report created: 0013561 
> (http://bugs.scribus.net/view.php?id=13561). If there are unwanted 
> side effects or other problems that prevent this change, simply close 
> the bug.

i worked on a simple patch, jean improved it and committed it yesterday 
evening:

https://github.com/scribusproject/scribus/commit/3748f65dfeafd1d32d2eaaa942b01f1fed146b1b

the improved behavior will be in the next stable 1.6!

ciao
a.l.e