Issue while saving question

[Sander Drenth]

While saving question the text is saved as "0".

Changing phptype from text to string for text field in xpquestion.map.inc.php will fix this issue.

'text' => 
    array (
      'dbtype' => 'text',
      'phptype' => 'string',
      'null' => true,
      'default' => '',
    ),