Fix PAGE_MASK vs PAGE_SIZE_IN_BITS bug in pbm
Fix PAGE_MASK vs PAGE_SIZE_IN_BITS bug in pbm

This was resulting in some duplicates being able to sneak past the
deduplication checking

zmap/zmap,coolacid/zmap,BobuSumisu/zmap,potatozhao/zmap,KeelanArrendale/zmap,zhuyue1314/zmap,zhuyue1314/zmap,willscott/zmap,unixfreaxjp/zmap,3L3N4/zmap,djeraseit/zmap,eacha/zmap,tdi/zmap,3L3N4/zmap,zmap/zmap,willscott/zmap,BobuSumisu/zmap,djeraseit/zmap,potatozhao/zmap,djeraseit/zmap,eacha/zmap,scarito/zmap,eacha/zmap,scarito/zmap-android,willscott/zmap,KeelanArrendale/zmap,scarito/zmap,djeraseit/zmap,unixfreaxjp/zmap,scarito/zmap-android,coolacid/zmap,unixfreaxjp/zmap,shakenetwork/zmap,djeraseit/zmap,tdi/zmap,KeelanArrendale/zmap,potatozhao/zmap,tdi/zmap,coolacid/zmap,BobuSumisu/zmap,scarito/zmap,potatozhao/zmap,scarito/zmap-android,KeelanArrendale/zmap,tdi/zmap,coolacid/zmap,cicku/zmap,zhuyue1314/zmap,eacha/zmap,shakenetwork/zmap,scarito/zmap,BobuSumisu/zmap,zhuyue1314/zmap,zmap/zmap,willscott/zmap,unixfreaxjp/zmap,shakenetwork/zmap,3L3N4/zmap,zhuyue1314/zmap,KeelanArrendale/zmap,tdi/zmap,BobuSumisu/zmap,scarito/zmap,shakenetwork/zmap,cicku/zmap,unixfreaxjp/zmap,eacha/zmap,cicku/zmap,cicku/zmap,3L3N4/zmap,potatozhao/zmap,3L3N4/zmap,shakenetwork/zmap,willscott/zmap,coolacid/zmap,cicku/zmap,scarito/zmap-android