Print out full pathname in fc-match -v as well. Reported by Frederic

Print out full pathname in fc-match -v as well. Reported by Frederic
    Crozat.
Fix bug where fc-match crashes when given __DUMMY__ property to match on.
(I added the __DUMMY__ string to enable callers of FcObjectToPtrLookup to
    distinguish an error return from a successful return. -PL)
reviewed by: plam