po: Update Italian translation (try 2)

[Matteo Bruni]

2013/6/17 Fabian Ebner <f.ebner94 at gmail.com>:
> Fixed a typo and a sentence, thanks to Matteo
> ---
>  po/it.po | 40 ++++++++++++++--------------------------
>  1 file changed, 14 insertions(+), 26 deletions(-)

 #: jscript.rc:39
 msgid "'return' statement outside of function"
-msgstr ""
+msgstr "Istruzione 'return' fouri della funzione"

Sorry, but this is worse...