fix test

Signed-off-by: Tony Najjar <tony.najjar.1997@gmail.com>

Author: tonynajjar

nav2_mppi_controller/test/trajectory_visualizer_tests.cpp

@@ -150,6 +150,10 @@ TEST(TrajectoryVisualizerTests, VisCandidateTrajectories)
   // Create costs array for the trajectories
   Eigen::ArrayXf costs = Eigen::ArrayXf::LinSpaced(200, 0.0f, 100.0f);
 
+  builtin_interfaces::msg::Time cmd_stamp;
+  cmd_stamp.sec = 5;
+  cmd_stamp.nanosec = 10;
+
   TrajectoryVisualizer vis;
   vis.on_configure(node, "my_name", "fkmap", parameters_handler.get());
   vis.on_activate();