#7 using -progress switch on ex1_pass2.rib raises SIGSEGV

[Paul Rotering]

version: Pixie-linux-1.2.1.tgz
OS: Debian linux

Rendering pass 2 of example 1 works fine unless you use
the '-progress' switch with rndr. With the switch,
processing halts with a segfault at around 50% completion.