gcc: fix an uninitialized variable warning from G++ 4.5
gcc: fix an uninitialized variable warning from G++ 4.5

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