The local GUID variable 'UdfDevPathGuid', it has been initialized during its declaration. For better coding style, this commit uses a global variable instead. Cc: Paulo Alcantara <pcacjr@zytor.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Eric Dong <eric.dong@intel.com> Cc: Dandan Bi <dandan.bi@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Paulo Alcantara <pcacjr@zytor.com> Reviewed-by: Star Zeng <star.zeng@intel.com>