api: fix bounds from range

Author: mloubout

devito/types/dimension.py

@@ -318,12 +318,12 @@ def _arg_values(self, interval, grid=None, args=None, **kwargs):
         # may represent sets of legal values. If that's the case, here we just
         # pick one. Note that we sort for determinism
         try:
-            loc_minv = loc_minv.stop
+            loc_minv = loc_minv.start
         except AttributeError:
             with suppress(TypeError):
                 loc_minv = sorted(loc_minv).pop(0)
         try:
-            loc_maxv = loc_maxv.stop
+            loc_maxv = loc_maxv.stop - 1
         except AttributeError:
             with suppress(TypeError):
                 loc_maxv = sorted(loc_maxv).pop(0)