PSPP-BUG: match_nodes() in covariance-matrix.c

[Ben Pfaff]

Hi Jason.  It looks to me that some of the logic in match_nodes()
in covariance-matrix.c is reversed.  In particular,
compare_values_short() returns nonzero if values differ, which it
seems to me should make match_nodes() return nonzero also, but in
fact it makes match_nodes() return 0.  So I think that each
"compare_values_short(...)" should really be
"!compare_values_short(...)".

Is my analysis correct?  (I don't understand anything above the
level of this single function, so I could be way off.)
-- 
"Term, holidays, term, holidays, till we leave school,
 and then work, work, work till we die."
C. S. Lewis