[OO] Revised Class PMC's isa() vtable entry to delegate to isa_pmc() as soon as possible, given the idea that it's much faster to compare two PMCs against each other than it is to perform repeated STRING allocations and comparisions.  If that's not always true, it soon will be.
[OO] Revised Class PMC's isa() vtable entry to delegate to isa_pmc() as soon as
possible, given the idea that it's much faster to compare two PMCs against each
other than it is to perform repeated STRING allocations and comparisions.  If
that's not always true, it soon will be.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@32302 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot