tracker-fts: protect better against invalid UTF-8.
tracker-fts: protect better against invalid UTF-8.

Also, remove 2 mistakenly added dbus g_print()s.

outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker