[oo] Reduced the number of PMCs created in Parrot_ComputeMRO_C3, which is a modest optimization.
[oo] Reduced the number of PMCs created in Parrot_ComputeMRO_C3, which is a
modest optimization.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@38476 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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