Fix for 4096878, drop shadow effect not displayed correctly on tbray.org/ongoing...

	Fix for 4096878, drop shadow effect not displayed correctly on tbray.org/ongoing/.  Block minmaxwidth was
	broken when negative margins were used and did not properly decrease the max width.

        Reviewed by Maciej

        * khtml/rendering/render_block.cpp:
        (khtml::RenderBlock::calcBlockMinMaxWidth):
        * layout-tests/fast/block/float/034-expected.txt: Added.
        * layout-tests/fast/block/float/034.html: Added.
        * layout-tests/fast/block/float/035-expected.txt: Added.
	* layout-tests/fast/block/float/035.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9044 268f45cc-cd09-0410-ab3c-d52691b4dbfc