deselect points on clearing path

src/main/resources/assets/carpet/scripts/camera.sc

@@ -85,6 +85,7 @@ __start_with(points_supplier) ->
     global_color_b = str('dust %.1f %.1f %.1f 1',(((code/1000)%10)/10),(((code/10000)%10)/10), (((code/100000)%10)/10) );// 'dust 0.6 0.6 0.6 1'
 
     global_points = call(points_supplier);
+    global_selected_point = null;
     __update();
     show();
     str('Started path at %.1f %.1f %.1f', p~'x', p~'y', p~'z');
@@ -105,6 +106,7 @@ clear() ->
    global_points = l();
    global_dimension = null;
    global_player = null;
+   global_selected_point = null;
    global_showing_path = false;
    global_playing_path = false;
    __update();