Array of unions

[Guy Harris]

> ...the C compiler bombs with "Fatal error in /lib/ccom".

That's the best it could give you; that message is the "cc" command's
cryptic way of telling you that the compiler pass whose binary is in
/lib/ccom got a signal and dumped core/MOS.  "cc" should dump the signal
name (NOT number) and an indication of whether core was dumped or not.  At
least that would give the poor user a bit better indication of what went
wrong, and might help a little bit in debugging the compiler.

	Guy Harris