2008-09-15 Alice Liu <alice.liu@apple.com>

2008-09-15  Alice Liu  <alice.liu@apple.com>

        A change needed to make PPC bots pass accessibility/table-cell-spans.html layout test

        Reviewed by Stephanie Lewis.

        * DumpRenderTree/mac/AccessibilityUIElementMac.mm:
        Calling -[NSValue rangeValue] on nil object was returning bogus results on PPC,
        but not Intel.  Add a check for nil before calling.
        (AccessibilityUIElement::rowIndexRange):
        (AccessibilityUIElement::columnIndexRange):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@36481 268f45cc-cd09-0410-ab3c-d52691b4dbfc