[Gtkpod-devel] Typo in some comments

[Daniele F. <df...@gm...>]

In some comments in src/prefs.c and in src/prefs.h the words
"preference" and "preferences" are missing an "e".

The attached patch is the result of running
perl -i -p -e s/prefrence/preference/ ./src/prefs.[ch]
cvs diff -u ./src/prefs.[ch] >typo.diff
-- 
Daniele