fixing form margins

[Dirk Mueller]

On Wednesday 21 January 2004 14:19, Stephan Kulow wrote:

> and found one #warning fixme in there (of the same 1.10 commit)
> and attached patch finishes the merge.

I don't want another virtual method in dom_nodeimpl.h, just for this one case. 

remove that virtual stuff, and replace the render_block one with

id() == ID_FORM && static_cast<HTMLFormElementImpl*>(element())->isMalformed()


Then its okay with me.