Fix a small bug in parameter processing that would always result in at least on entry in a VectorParam even if the string was empty.
Fix a small bug in parameter processing that would always result
in at least on entry in a VectorParam even if the string was
empty.

sim/param.cc:
    if there are no parameters, leave the vector empty.

--HG--
extra : convert_revision : d0d41baa8c77651a27ac6a4d02cc388711f47dbe

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