vastResponse bug fix after re-factor

Author: iq-dot

src/Player.jsx

@@ -84,7 +84,7 @@ class Player extends React.PureComponent {
         console.log('SUGGESTV: start ad', vastAd, player);
         this.props.updateState({
           adStart: this.props.adStart ? `${this.props.adStart},adStart` : 'adStart',
-          adSrc: player.vast.vastResponse.MediaFiles.length ? player.vast.vastResponse.mediaFiles[0].src : 'N/A',
+          adSrc: player.vast.vastResponse.mediaFiles.length ? player.vast.vastResponse.mediaFiles[0].src : 'N/A',
         });
         // querySelectorAll seems like a risky way to do this?
         // Could cause problems if we ever have multiple videos on the page?