MijoPolls и Strict Standards - Общие вопросы по расширениям Joomla

Strict Standards: Non-static method MijopollsHelper::is15() should not be called statically, assuming $this from incompatible context in E:\WEB\htdocs\newsite\administrator\components\com_mijopolls\tables\poll.php on line 40

			else {
				$menu_items	= $menus->getItems('component_id', $component->id);
			}
			
			$itemid		= null;
			
			if (isset($menu_items)) {
				foreach ($menu_items as $item) {
					if ((@$item->query['view'] == 'poll') && (@$item->query['id'] == $row->id)) {
						$itemid = '&Itemid='.$item->id;
						break;
					}			
				}
			}
			
			$link = JRoute::_('index.php?option=com_mijopolls&view=poll&id='.$row->slug.$itemid); 
		
		?>
			<tr class="sectiontableentry<?php echo $k + 1; ?>">
				<td>
					<?php echo $this->pagination->getRowOffset($i); ?>
				</td>
				<td>
					<span class="hasTip" title="<?php echo JText::_('COM_MIJOPOLLS_VIEW');?>">
						<a href="<?php echo $link;?>"><?php echo $row->title; ?></a>
					</span>
				</td>
				<?php if ($this->params->get('show_start_date')) { ?>
				<td align="center">
					<?php echo JFactory::getDate($row->publish_up)->toFormat($this->params->get('date_format')); ?>
				</td>
				<?php } ?>	
				<?php if($this->params->get('show_end_date')) { ?>
				<td>
					<?php echo JFactory::getDate($row->publish_down)->toFormat($this->params->get('date_format')); ?>
				</td>
				<?php } ?>				
				<?php if ($this->params->get('show_status')) { ?>
				<td align="center" style="text-transform:capitalize;">
					<?php 
					if ($this->params->get('show_status_as')) { ?>
						<img src="<?php echo JURI::base(); ?>media/mijopolls/images/poll-<?php echo $row->status; ?>.gif" />
					<?php 
					} else {