Remove FcCompareSize()

Use FcCompareNumber().  The FcCompareSize() returns 0 ("perfect match")
if v2 is zero.  I cannot think of a use-case for this.  The code has been
there from initial commit in 2002.  I suppose back then Keith had a use
for size=0 to mean scalable or something.  Anyway, remove and see.
2 files changed