UAVCAN: Optical Flow: Bug fix (missing integration_timespan field in optical_flow topic). (#13257)

Author: JacobCrabill

src/drivers/uavcan/sensors/flow.cpp

@@ -68,6 +68,7 @@ UavcanFlowBridge::flow_sub_cb(const uavcan::ReceivedDataStructure<com::hex::equi
 	optical_flow_s flow{};
 
 	flow.timestamp = hrt_absolute_time();
+	flow.integration_timespan = 1.e6f * msg.integration_interval; // s -> micros
 	flow.pixel_flow_x_integral = msg.flow_integral[0];
 	flow.pixel_flow_y_integral = msg.flow_integral[1];