Merge pull request #413 from Robbt/fix/check_is_block_before_is_static

This adds an additional check to prevent calling a non-existent function

airtime_mvc/application/views/scripts/playlist/update.phtml

@@ -4,7 +4,7 @@ $isSmartBlock = ($this->obj instanceof Application_Model_Block);
 $isPlaylist = ($this->obj instanceof Application_Model_Playlist);
 if (count($items) && ($isSmartBlock || $isPlaylist)) : ?>
 <?php $i = 0; ?>
-<?php if (!($this->obj->isStatic())) {
+<?php if ($isSmartBlock && !($this->obj->isStatic())) {
         echo _("</br>This is only a preview of possible content generated by the smart block based upon the above criteria.");}
 ?>
 <?php foreach($items as $item) :