Changing from tf::Transform to tf::StampedTransform

edit

Could someone try to change any part of my code in order to use tf::StampedTransform. I've been trying to just replace it in place of tf::Transform directly, it doesn't work. I should have been missing something I think. This is needed because I cannot see the base_link movement with respect to the world. I think the tf is not correctly published with the below code.

sensor_msgs::PointCloud2 cloud; //Class variable

//    In a callback function
{
sensor_msgs::PointCloud2 c_tmp;

static tf::TransformBroadcaster tfb;
tf::Transform xform;
xform.setOrigin(tf::Vector3(pose3D_LDD.pose.position.x, pose3D_LDD.pose.position.y, pose3D_LDD.pose.position.z));
xform.setRotation(tf::Quaternion(pose3D_LDD.pose.orientation.x, pose3D_LDD.pose.orientation.y, pose3D_LDD.pose.orientation.z, pose3D_LDD.pose.orientation.w));
tfb.sendTransform(tf::StampedTransform(xform, ros::Time(pose3D_LDD.header.stamp), "world", "base_link"));
tfListener_.waitForTransform("world", "base_link", previous_scan_.header.stamp, ros::Duration(1.0));

try
{
    projector_.transformLaserScanToPointCloud("laser", previous_scan_, c_tmp, tfListener_);

    if (!initialized_cloud_)
    {
        cloud = c_tmp;
        initialized_cloud_ = true;
    }
    else
    {
         pcl::concatenatePointCloud(cloud, c_tmp, cloud);

         ROS_INFO("From c_tmp: Got cloud with %u of width and %u of height", c_tmp.width, c_tmp.height);
         ROS_INFO("From cloud: Got cloud with %u of width and %u of height", cloud.width, cloud.height);
    }
}

Thanks in advance.