Display link to message form for this item’s author.

Using this link you can send a message to the author.

== Example ==

  $Item->msgform_link( array(
            'before'   => ' ',
            'after'    => ' ',
            'text'     => '#',
            'title'    => '#',
            'class'    => ''
    ) );

== Parameters ==

* Name: before
* Default: (1 space)
* Usage: Displayed before the link.
* Name: after
* Default: (1 space)
* Usage: Displayed after the link.
* Name: text
* Default: ‘#’
* Usage: Link text, ‘#’ for default. If ‘text’ is not ‘#’ then link will be displayed instead email image.
* Name: title
* Default: ‘#’
* Usage: Link title/alt, ‘#’ for default.
* Name: class
* Default: (no space)
* Usage: CSS class.

== Return value ==

This function returns false, if there is no email address for the item’s author.

If there is email then this function return true and displays content.