- fix an assertion failure in Vector::at() beneath
          WebHistoryItem::dictionaryRepresentation.

        * WebHistoryItem.cpp:
        (WebHistoryItem::dictionaryRepresentation): Give the numbers vector initial
        size. Also reduced the inline capacity of the vector used for weekly visit
        counts to 5, which is the expected maximum size.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@40726 268f45cc-cd09-0410-ab3c-d52691b4dbfc