minor fix

src/lidar_lite_driver_node.cpp

@@ -54,7 +54,7 @@ LidarLiteDriverNode::ThreadFunc(void)
       this->range_msg_.field_of_view = 0.1;
       this->range_msg_.min_range = 0;
       this->range_msg_.max_range = 40;
-      this->range_msg_.range = range/100.0;
+      this->range_msg_.range = (double)range/100.0;
       this->range_publisher_.publish(this->range_msg_);
 
       // Increment range publisher counter.