Fix for 3892686, left/top overflow was not being propagated properly up to containin...

	Fix for 3892686, left/top overflow was not being propagated properly up to containing blocks because of a math
	error.

	Also fix a bug I noticed on the same page where relative position offsets were not being added in properly for
	all inlines when repainting.

        Reviewed by rjw

        * khtml/rendering/render_block.cpp:
        (khtml::RenderBlock::layoutBlockChildren):
        * khtml/rendering/render_flow.cpp:
        (RenderFlow::getAbsoluteRepaintRect):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8177 268f45cc-cd09-0410-ab3c-d52691b4dbfc