continue to copy nurse from prev cycle item even not blank line of nurse

netforce_clinic/models/visit.py

@@ -300,7 +300,11 @@ class Visit(Model):
             for item2 in get_model("clinic.cycle.item").search_browse(dom):
                 lines=[]
                 for line in item2.lines:
+                    if not line:
+                        continue
                     nr=line.nurse_id
+                    if not nr:
+                        continue
                     dpt=line.department_id
                     lines.append(('create', {
                         'nurse_id': nr.id,