convert Box to BoxND

Src/Base/AMReX_BaseFwd.H

@@ -22,7 +22,9 @@ class BoxList;
 class DistributionMapping;
 class Geometry;
 
-class Box;
+template<int dim>
+class BoxND;
+using Box = BoxND<AMREX_SPACEDIM>;
 template<int dim>
 class IntVectND;
 using IntVect = IntVectND<AMREX_SPACEDIM>;