SecurityPkg TcgStorageCoreLib: ASSERT to ensure 'ByteSeq' is not NULL

Add ASSERT to make sure 'ByteSeq' is not NULL before comsumed by
CopyMem().

Cc: Eric Dong <eric.dong@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

SecurityPkg/Library/TcgStorageCoreLib/TcgStorageCore.c

@@ -1435,6 +1435,8 @@ TcgGetNextTcgUid(
     return TcgResultFailure;
   }
 
+  ASSERT (ByteSeq != NULL);
+
   CopyMem(Uid, ByteSeq, sizeof(TCG_UID));
 
   return TcgResultSuccess;