title: Using WHERE in SQL statement on ENUM type breaks mysql_query
body: <p>The Code:</p>
  
  <pre><code>        $query = "SELECT * FROM tweets WHERE read=n";
          $result = mysqli_query($mysqli,$query);
  
          $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
          echo $row["from_user"], $row["text"];
  </code></pre>
  
  <p>The above code gives me this:</p>
  
  <pre><code>Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in /index.php on line 16 
  </code></pre>
  
  <p>The below code does not:</p>
  
  <pre><code>        $query = "SELECT * FROM tweets";
          $result = mysqli_query($mysqli,$query);
  
          $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
          echo $row["from_user"], $row["text"];
  </code></pre>
  
  <p>The "read" field is ENUM('y','n').</p>