The original code will assert when dealing with those empty FVs. The fix is used to solve this bug. Cc: Chao Zhang <chao.b.zhang@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>