Submitted by: Tobias Lidskog <tobiaslidskog@mac.com>
Reviewed by: eseidel
        Test cases added:
        * svg-tests/W3C-SVG-1.1/filters-comptran-01-b-expected.checksum: Added.
        * svg-tests/W3C-SVG-1.1/filters-comptran-01-b-expected.png: Added.
        * svg-tests/W3C-SVG-1.1/filters-comptran-01-b-expected.txt: Added.
        * svg-tests/W3C-SVG-1.1/filters-comptran-01-b.svg: Added.
        * svg-tests/W3C-SVG-1.1/filters-comptran-01-b.svg-disabled: Removed.
        * svg-tests/W3C-SVG-1.1/filters-turb-01-f-expected.checksum: Added.
        * svg-tests/W3C-SVG-1.1/filters-turb-01-f-expected.png: Added.
        * svg-tests/W3C-SVG-1.1/filters-turb-01-f-expected.txt: Added.
        * svg-tests/W3C-SVG-1.1/filters-turb-01-f.svg: Added.
        * svg-tests/W3C-SVG-1.1/filters-turb-01-f.svg-disabled: Removed.

        Re-enabled disabled filter tests.
        * ksvg2/impl/SVGFEComponentTransferElementImpl.cpp:
        (SVGFEComponentTransferElementImpl::createCanvasItem):
        (SVGFEComponentTransferElementImpl::close):
        * ksvg2/impl/SVGFETurbulenceElementImpl.cpp:
        (SVGFETurbulenceElementImpl::createCanvasItem):
        Added null check to filter code, preventing crash.
        http://bugzilla.opendarwin.org/show_bug.cgi?id=4701


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@10373 268f45cc-cd09-0410-ab3c-d52691b4dbfc