PHP strict notices

I was trialling this out.
Got a load of PHP complaints (I run strict on dev) so I had to eliminate them before I could evaluate the rest.

Turns out that as it doesn't do secondary nodereferences or taxonomy, it won't fit what I'm building. I guess I'll look at one of the iframe solutions instead.

Anyway, here are a few improvements to stop the PHP issues in the case of "rendering fields for a node that hasn't been created yet" - empty data assumptions caused some issues. You'll only see it with E_ALL on, or a CVS checkout of core I guess.