Fix license check for libical files. They are dual-licensed as LGPL and MPL 1.0, but neither was detected. Also, all '0' were removed from the license check, which I don't think was intended.

I suppose these changes should also be merged into kde-common/svn/hooks/post-commit.pl, but I don't want to take the risk of breaking our commit system. So I'll leave this to Dirk or Thiago.