Now that PMCNULL cannot be NULL, update some function annotations
Now that PMCNULL cannot be NULL, update some function annotations

tkob/parrot,tkob/parrot,parrot/parrot,gitster/parrot,gagern/parrot,gagern/parrot,gitster/parrot,FROGGS/parrot,gagern/parrot,youprofit/parrot,parrot/parrot,parrot/parrot,gagern/parrot,tkob/parrot,gitster/parrot,FROGGS/parrot,parrot/parrot,youprofit/parrot,tkob/parrot,gagern/parrot,tkob/parrot,gagern/parrot,gitster/parrot,parrot/parrot,gagern/parrot,youprofit/parrot,youprofit/parrot,youprofit/parrot,FROGGS/parrot,tkob/parrot,youprofit/parrot,tkob/parrot,tkob/parrot,youprofit/parrot,FROGGS/parrot,youprofit/parrot,FROGGS/parrot,FROGGS/parrot,FROGGS/parrot,gitster/parrot,FROGGS/parrot,gitster/parrot,gitster/parrot