fixup for domainless problems with tasks

hysop/problem.py

@@ -90,7 +90,7 @@ class Problem(ComputationalGraph):
                 vprint_banner(msg, at_border=2)
                 sys.exit(0)
         comm = self.mpi_params.comm
-        if self.domain.has_tasks:
+        if (not self.domain is None) and self.domain.has_tasks:
             comm = self.domain.parent_comm
         size = comm.Get_size()
         avg_time = comm.allreduce(tm.interval) / size
@@ -267,7 +267,7 @@ class Problem(ComputationalGraph):
                     self.profiler_report()
 
         comm = self.mpi_params.comm
-        if self.domain.has_tasks:
+        if (not self.domain is None) and self.domain.has_tasks:
             comm = self.domain.parent_comm
         size = comm.Get_size()
         avg_time = comm.allreduce(tm.interval) / size