Code forgot to initialize the optional weight between adjacent vertices. It caused wrong MTRR result was calculated for some memory settings. The logic was incorrectly removed when converting from POC code. The patch adds back the initialization. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>