dsl: Dimension off by one mistake

Author: JDBetteridge

devito/types/dimension.py

@@ -1041,7 +1041,7 @@ def _arg_defaults(self, _min=None, size=None, alias=None):
                     raise ValueError(f"Incompatible size for ConditionalDimension "
                                      f"{self.name}: {size} < {size0}")
             else:
-                defaults[dim.parent.max_name] = range(d0, d0 + factor*size - 1)
+                defaults[dim.parent.max_name] = range(d0, d0 + factor*size)
 
         return defaults