create deep copies to allow changes of constraints per arrival

aman/formats/SctEseFormat.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 
+import copy
 import sys
 
 from aman.types.ArrivalRoute import ArrivalRoute
@@ -137,10 +138,10 @@ class SctEseFormat:
                     sys.stderr.write('Unable to find a close waypoint for ' + waypoint)
                     sys.exit(-1)
 
-                waypoints.append(nearest)
+                waypoints.append(copy.deepcopy(nearest))
             # extend the list of waypoints
             else:
-                waypoints.append(coordinates[0])
+                waypoints.append(copy.deepcopy(coordinates[0]))
 
         # create the arrival route
         return ArrivalRoute(split[3], split[2], waypoints)