Needn't to copy register table if AllocatedSize is 0. v4: Fix potential uninitialized variable issue. v5: Set DestinationRegisterTableList[Index].RegisterTableEntry before RegisterTableEntry is updated. Cc: Feng Tian <feng.tian@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>