Holger Hans Peter Freyther <holger.freyther@trolltech.com>

Holger Hans Peter Freyther <holger.freyther@trolltech.com>

* Ask the WebCore::IconDatabase only if our URL is not empty. Otherwise
  we will see a crash in a HashSet.
* It is crashing there because the StringImpl of an empty String is 0.
* We avoid this crash by checking for isEmpty() in WebKit as there is no
  use to ask the iconDatabase for an empty string. We will fallback to the
  defaultIcon.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@29614 268f45cc-cd09-0410-ab3c-d52691b4dbfc