title: JQGRID show blank instead of Null
body: <p>Am using <code>JQGrid</code> and am getting Null displayed in the grid as it comes from DB. I can change the query to return Blank value.</p>
  
  <p>But am try to handle using JQGrid. How do i <code>replace null by blank values</code> in Grid.</p>
  
  <p>I don want to show NULL to users instead show blank.</p>
  
  <p>How do i achieve this in JQGrid ?</p>
  
  <p>Thanks</p>