Reviewed by Dave Hyatt.

        - fix http://bugs.webkit.org/show_bug.cgi?id=15887
          REGRESSION (r27576): Crash in RenderStyle::affectedByHoverRules clicking link on Digg

        Test: fast/css/display-none-inline-style-change-crash.html

        * dom/Element.cpp:
        (WebCore::Element::recalcStyle): Fixed the crash by null-checking
        the current style and removed other checks that are not strictly
        necessary.

LayoutTests:

        Reviewed by Dave Hyatt.

        - test for http://bugs.webkit.org/show_bug.cgi?id=15887
          REGRESSION (r27576): Crash in RenderStyle::affectedByHoverRules clicking link on Digg

        * fast/css/display-none-inline-style-change-crash-expected.txt: Added.
        * fast/css/display-none-inline-style-change-crash.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27579 268f45cc-cd09-0410-ab3c-d52691b4dbfc