Fix for 3258403, implement support for min-height and max-height on normal flow...

	Fix for 3258403, implement support for min-height and max-height on normal flow elements.  With this patch the
	only min-height/max-height work that remains to be done is for table cells and positioned elements.

        Reviewed by darin

        * khtml/rendering/render_box.cpp:
        (RenderBox::calcHeight):
        (RenderBox::calcHeightUsing):
        (RenderBox::calcPercentageHeight):
        * khtml/rendering/render_box.h:
        * layout-tests/fast/block/basic/minheight-expected.txt: Added.
        * layout-tests/fast/block/basic/minheight.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@6482 268f45cc-cd09-0410-ab3c-d52691b4dbfc