terrainnav: send resolution updates to planner

Signed-off-by: Rhys Mainwaring <rhys.mainwaring@me.com>

Author: srmainwaring

MAVProxy/modules/mavproxy_terrainnav/terrainnav.py

@@ -447,6 +447,8 @@ def setting_callback(pipe, setting):
             pipe.send(tp.PlannerTerrainSource(setting.value))
         elif setting.name == "time_budget":
             pipe.send(tp.PlannerTimeBudget(setting.value))
+        elif setting.name == "resolution":
+            pipe.send(tp.PlannerResolution(setting.value))
 
     def settings_dialog(self):
         """