Prediction: fix nullptr error in predictor_manager

modules/prediction/predictor/predictor_manager.cc

@@ -220,9 +220,9 @@ void PredictorManager::Run(const PerceptionObstacles& perception_obstacles) {
         }
       }
       prediction_obstacle.set_timestamp(obstacle->timestamp());
+      prediction_obstacle.set_is_static(obstacle->IsStill());
     }
 
-    prediction_obstacle.set_is_static(obstacle->IsStill());
     prediction_obstacle.set_predicted_period(FLAGS_prediction_duration);
     prediction_obstacle.mutable_perception_obstacle()->CopyFrom(
         perception_obstacle);

modules/prediction/proto/prediction_obstacle.proto

@@ -54,7 +54,7 @@ message PredictionObstacle {
 
   optional ObstaclePriority priority = 6;
 
-  optional bool is_static = 7;
+  optional bool is_static = 7 [default = true];
 }
 
 message PredictionObstacles {