Tone down overzealous assertion from r158097.

RenderElement::initializeStyle() really only cares that there are no
text renderers that we should be calling styleDidChange() on.

Tweak the code to only check that there are no text children.

* rendering/RenderElement.cpp:
(WebCore::RenderElement::initializeStyle):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@158099 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Fix 4 asserting SVG tests after r158097.

RenderElement::setStyle() is, quite surprisingly, a virtual function
with a single override in RenderSVGBlock.
To match the old behavior, we have to rewrite the display type from
any inline type to block instead.

* rendering/RenderElement.cpp:
(WebCore::RenderElement::initializeStyle):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@158100 268f45cc-cd09-0410-ab3c-d52691b4dbfc