#i124970# fix DocumentFocusListener::notifyEvent's handling of IndexOutOfBoundsException

the DocumentFocusListener::notifyEvent() throw list only allows a RuntimeException to
propagate. The methods called in notifyEvent() allow IndexOutOfBoundsException though,
so it must be handled in all cases to prevent C++ from invoking its unexpected() abort
mechanisms. Ceterum censeo, non-empty throw lists should be removed altogether...

Merged from trunk revision 1604709


git-svn-id: https://svn.apache.org/repos/asf/openoffice/branches/AOO410@1606707 13f79535-47bb-0310-9956-ffa450edef68