rosserial multi-array issue

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Here is the relevant parts of my Arduino code:

   #include <Arduino.h>
#include "TeensyThreads.h"

// for ROS
#include <ros.h>
#include <std_msgs/Int16.h>
#include <std_msgs/Int16MultiArray.h>

volatile int liDARfront = -1;
volatile int liDARleft = -1;
volatile int liDARright = -1;

// ROS Variables
ros::NodeHandle  nh;

std_msgs::Int16 front_msg;
std_msgs::Int16 left_msg;
std_msgs::Int16 right_msg;

std_msgs::Int16MultiArray lidar; //multiarray

ros::Publisher range_front("lidar/range_front", &front_msg);
ros::Publisher range_left("lidar/range_left", &left_msg);
ros::Publisher range_right("lidar/range_right", &right_msg);

ros::Publisher lidar_pub("lidarArray", &lidar); //multiarray

void setup()
{
    Serial1.begin(115200); // HW Serial for TFmini Front
    Serial2.begin(115200); // HW Serial for TFmini Left
    Serial3.begin(115200); // HW Serial for TFmini Right
    Serial.begin(115200); // Serial output through USB to computer

    delay (100); // Give a little time for things to start

    // init ros node
    nh.initNode();
    nh.advertise(range_front);
    nh.advertise(range_left);
    nh.advertise(range_right);

    // for multiarray
    lidar.layout.dim = (std_msgs::MultiArrayDimension *)
    malloc(sizeof(std_msgs::MultiArrayDimension) * 2);
    lidar.layout.dim[0].label = "lidar";
    lidar.layout.dim[0].size = 2;
    lidar.layout.dim[0].stride = 1*2;
    lidar.layout.data_offset = 0;
    lidar.layout.dim_length = 1;
    lidar.data_length = 8;
    lidar.data = (int *)malloc(sizeof(int)*2);
    nh.advertise(lidar_pub);
}


void loop()
{
  delay(10);  // Don't want to read too often as TFmini samples at 100Hz
  Serial.println(liDARfront);

  // publish to ROS
  front_msg.data = liDARfront;
  left_msg.data = liDARleft;
  right_msg.data = liDARright;

  // collect to one topic
  lidar.data[0] = liDARfront;
  lidar.data[1] = liDARleft;
  lidar.data[2] = liDARright;


  range_front.publish( &front_msg );
  range_left.publish( &left_msg );
  range_right.publish( &right_msg );

  lidar_pub.publish( &lidar);

  nh.spinOnce();
}

I get an error that reads:

Arduino: 1.8.5 (Linux), TD: 1.41, Board: "Teensy 3.2 / 3.1, Serial, 96 MHz (overclock), Faster, US English"

TFmini: In function 'void setup()':
 error: cannot convert 'int*' to 'std_msgs::Int16MultiArray::_data_type* {aka short int*}' in assignment
     lidar.data = (int *)malloc(sizeof(int));
                ^
cannot convert 'int*' to 'std_msgs::Int16MultiArray::_data_type* {aka short int*}' in assignment

any help would be much appreciated!