mpi: fix halo ispace with subdomains

Author: mloubout

devito/ir/clusters/algorithms.py

@@ -472,7 +472,7 @@ def callback(self, clusters, prefix, seen=None):
             expr = Eq(self.B, HaloTouch(*points, halo_scheme=hs))
 
             key0 = lambda i: i in prefix[:-1] or i in hs.loc_indices  # noqa: B023
-            key1 = lambda i: i not in hs.distributed_defined  # noqa: B023
+            key1 = lambda i: not i._defines & set(hs.distributed_defined)  # noqa: B023
             key = lambda i: key0(i) and key1(i)  # noqa: B023
             ispace = c.ispace.project(key)