gEDA-dev: PCB MyFree

[DJ Delorie]

> There is already a hook to use <dmalloc.h>.  Surely they do all this
> better than we do.  Would it be better to drop all this stuff, and
> go back to the raw (possibly dmalloc-ified) malloc() and free()?

I would be OK with that.  Or, follow the GNU conventions and define
xmalloc(), xrealloc(), xcalloc(), and xfree() that act in a
well-defined way when passed NULL or zero length.