Make sure that sstv images table doesnt already exist

application/migrations/175_add_sstv_images_table.php

@@ -1,11 +1,14 @@
 <?php
 
-defined('BASEPATH') OR exit('No direct script access allowed');
+defined('BASEPATH') or exit('No direct script access allowed');
 
-class Migration_add_sstv_images_table extends CI_Migration {
+class Migration_add_sstv_images_table extends CI_Migration
+{
 
         public function up()
         {
+                // if sstv_images table doesn't exist
+                if (!$this->db->table_exists('sstv_images')) {
                         $this->dbforge->add_field(array(
                                 'id' => array(
                                         'type' => 'INT',
@@ -29,6 +32,7 @@ class Migration_add_sstv_images_table extends CI_Migration {
                         $this->dbforge->add_key('id', TRUE);
                         $this->dbforge->create_table('sstv_images');
                 }
+        }
 
         public function down()
         {