Display list image on teaser. Code style fixes.

[mikl]

Due to not using the right variable to access the list image field, the list image was not displayed.

The meat of the change is this:

-<div class="picture"><?php print $list_image; ?></div>
+<div class="picture"><?php print $field_list_image[0]['view']; ?></div>

[cableman]

Reviewed and approved for 1.9.0