new geomview problem

[mbp]

> Version 1.3 core dumps in LRefDecr if you start geomview with the name
> of a file that was made by saving the world as commands.

Fixed.  It was crashing in the "camera" command due to Lcamera() not
always returning a valid LObject pointer.  co the latest drawer.c
to get the fix.

Crashing in LRefDecr() with a bus error and a pointer value of
something like Ox1 or Ox2 is freqently the result of some Lfunction
not returning a valid LObject pointer.

--Makr