Trying to access array offset on null

File: /var/task/pagesection/livesite/article.story.php (78) Error 2

74
75if($rec['content_track'] != 0){
76	$track = dbQuery('SELECT track_title FROM track WHERE track_id = ' . $rec['content_track']);
77	$t = dbFetchArray($track);
78	$body .= '<h4 class="trackTitle">' . stripslashes($t['track_title']) .'</h4>';
79}
80
81$body .= '<h1>' . stripslashes($rec['content_title']) .'</h1>
82	<div class="dateText">' . date('F j, Y, g:i a', $rec['content_posted']) .'</div>';
83