Fplan patches

["Edward A. Falk" <falconer best com>]

Hi all; found another bug in db.c relating to cases where
an ident is not found.

Rather than post diffs, I'll just post pointers to the
corrected files:

	http://www.best.com/~falconer/common.h
	http://www.best.com/~falconer/db.c


-ed falk