kernel panic with new pseudo device

[matthew sporleder <msporleder%gmail.com@localhost>]

Hi, I'm trying to write a pseudo device with an envsys component.  I
mostly followed http://www.netbsd.org/docs/kernel/pseudo/ and got a
working device, but now I get a panic when I attempt to do:
sc->sc_sme = sysmon_envsys_create();

My best guess is that I didn't get any memory allocated for my _softc
structure, but I'm not really sure how to validate that.

A rough cut of my code is here:
http://mspo.com/code/screenblankenv.c.txt

Can anyone offer some hints?  I'm a little stuck.

Thanks,
Matt