disable creation of unknown objects for wma files, because we've seen the...

disable creation of unknown objects for wma files, because we've seen the cases when it could be as large as whole file, and we are greedy for the ram
CCMAIL:lalinsky@gmail.com


git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@1217775 283d02a7-25f6-0310-bc7c-ecb5cbfe19da