Improve french translation

Signed-off-by: pieterg <pieterg@users.sourceforge.net>
GetEcmInfo: Avoid that ecm has the value None

As this could lead to a GSOD in the Softcam Manager
http://openpli.org/forums/topic/33587-gsod-when-i-go-to-the-softcamsetup/page-2
Only clear CAID cache when it is filled with the fake CAID 0000

Hopefully this will improve the crypto icon behavior in the channel lists
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2 into BETA