fix unserialization of PacketFifo
fix unserialization of PacketFifo

dev/pktfifo.cc:
    fix unserialization.  calling resize on a list just sticks
    uninitialized garbage into the list.

--HG--
extra : convert_revision : 1cbff596dd0b88560e23b9368ec75a7369beb9d9

yb-kim/gemV,aclifton/cpeg853-gem5,TUD-OS/gem5-dtu,KuroeKurose/gem5,sobercoder/gem5,samueldotj/TeeRISC-Simulator,Weil0ng/gem5,yb-kim/gemV,kaiyuanl/gem5,briancoutinho0905/2dsampling,briancoutinho0905/2dsampling,rjschof/gem5,SanchayanMaity/gem5,markoshorro/gem5,TUD-OS/gem5-dtu,rallylee/gem5,SanchayanMaity/gem5,HwisooSo/gemV-update,yb-kim/gemV,yb-kim/gemV,powerjg/gem5-ci-test,KuroeKurose/gem5,aclifton/cpeg853-gem5,rjschof/gem5,rallylee/gem5,gedare/gem5,samueldotj/TeeRISC-Simulator,cancro7/gem5,joerocklin/gem5,qizenguf/MLC-STT,austinharris/gem5-riscv,samueldotj/TeeRISC-Simulator,austinharris/gem5-riscv,joerocklin/gem5,powerjg/gem5-ci-test,zlfben/gem5,Weil0ng/gem5,qizenguf/MLC-STT,gem5/gem5,kaiyuanl/gem5,yb-kim/gemV,gem5/gem5,qizenguf/MLC-STT,rallylee/gem5,TUD-OS/gem5-dtu,austinharris/gem5-riscv,cancro7/gem5,cancro7/gem5,aclifton/cpeg853-gem5,rjschof/gem5,sobercoder/gem5,markoshorro/gem5,KuroeKurose/gem5,SanchayanMaity/gem5,joerocklin/gem5,KuroeKurose/gem5,TUD-OS/gem5-dtu,rjschof/gem5,KuroeKurose/gem5,rallylee/gem5,yb-kim/gemV,joerocklin/gem5,gedare/gem5,Weil0ng/gem5,cancro7/gem5,aclifton/cpeg853-gem5,joerocklin/gem5,yb-kim/gemV,HwisooSo/gemV-update,aclifton/cpeg853-gem5,briancoutinho0905/2dsampling,briancoutinho0905/2dsampling,gem5/gem5,gem5/gem5,rallylee/gem5,zlfben/gem5,qizenguf/MLC-STT,powerjg/gem5-ci-test,austinharris/gem5-riscv,zlfben/gem5,sobercoder/gem5,powerjg/gem5-ci-test,Weil0ng/gem5,SanchayanMaity/gem5,Weil0ng/gem5,briancoutinho0905/2dsampling,kaiyuanl/gem5,gedare/gem5,sobercoder/gem5,qizenguf/MLC-STT,markoshorro/gem5,rallylee/gem5,TUD-OS/gem5-dtu,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,cancro7/gem5,zlfben/gem5,rjschof/gem5,rjschof/gem5,gem5/gem5,zlfben/gem5,markoshorro/gem5,gem5/gem5,TUD-OS/gem5-dtu,sobercoder/gem5,gedare/gem5,zlfben/gem5,zlfben/gem5,cancro7/gem5,samueldotj/TeeRISC-Simulator,Weil0ng/gem5,Weil0ng/gem5,markoshorro/gem5,gedare/gem5,kaiyuanl/gem5,briancoutinho0905/2dsampling,aclifton/cpeg853-gem5,SanchayanMaity/gem5,briancoutinho0905/2dsampling,samueldotj/TeeRISC-Simulator,rjschof/gem5,cancro7/gem5,austinharris/gem5-riscv,TUD-OS/gem5-dtu,kaiyuanl/gem5,gedare/gem5,austinharris/gem5-riscv,HwisooSo/gemV-update,joerocklin/gem5,sobercoder/gem5,yb-kim/gemV,rallylee/gem5,sobercoder/gem5,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,kaiyuanl/gem5,HwisooSo/gemV-update,kaiyuanl/gem5,markoshorro/gem5,joerocklin/gem5,HwisooSo/gemV-update,SanchayanMaity/gem5,HwisooSo/gemV-update,aclifton/cpeg853-gem5,austinharris/gem5-riscv,markoshorro/gem5,gedare/gem5,powerjg/gem5-ci-test,KuroeKurose/gem5,HwisooSo/gemV-update,powerjg/gem5-ci-test,qizenguf/MLC-STT,qizenguf/MLC-STT,gem5/gem5,SanchayanMaity/gem5,joerocklin/gem5