title: slickgrid can't scroll to the bottom
body: <p>i don't know what happen. i just load my data with json and applying paging with dataView. the data is displayed well but i can't scrolling to the bottom. so when i click "25" to show 25 rows, the table only display 24 rows. same if i click "50", "100" or all rows.
  i check with firebug, the JSON response is complete. 
  i tried to inspect element in the browser, compare mine with file "examples/example-optimizing-dataview.html". and i got this:<br />
  <strong>.slick-viewport</strong> has <strong>height: 452px;</strong><br />
  and on the example file<br />
  <strong>.slick-viewport</strong> has <strong>height: 473px;</strong><br /></p>
  
  <p>and if i change the height in firefox with inspect element feature. i can see the bottom of data.
  how do i solve this?
  here is my code <a href="http://pastebin.com/vqYEW1Zg" rel="nofollow">http://pastebin.com/vqYEW1Zg</a></p>