[Plugin: Latest Custom Post Type Updates] Bug – in_array() datatype conflict

Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home/site/public_html/rsl.site.ca/wp-content/plugins/latest-custom-post-type-updates/options.php on line 190
/> Posts

Local function appears as so:

<p> <!-- POST TYPE FOR WIDGET -->
    <label 	for="<?php echo $this->get_field_id('post_type'); ?>"><?php _e('Post Types:'); ?></label>
        <?php
        // Filter out post types that are internal such as attachments or internal theme post types used for options.
        $args = array(
            'show_ui' => true,
        );
        $post_types = get_post_types($args, 'objects');
        foreach($post_types as $post_type=>$vars) {
            echo '<br /><input type="checkbox"
				name="'.$this->get_field_name('post_type').'[]"
				value="'.$post_type.'"';
            	if( in_array($post_type, $instance['post_type'] ) ) echo 'checked="checked"';
            echo ' /> '.$vars->labels->name.'';
        }
        ?>
    </select>
</p>

Suggested fix: Check is_array() before executing in_array().

<p> <!-- POST TYPE FOR WIDGET -->
    <label 	for="<?php echo $this->get_field_id('post_type'); ?>"><?php _e('Post Types:'); ?></label>
        <?php
        // Filter out post types that are internal such as attachments or internal theme post types used for options.
        $args = array(
            'show_ui' => true,
        );
        $post_types = get_post_types($args, 'objects');
        foreach($post_types as $post_type=>$vars) {
            echo '<br /><input type="checkbox"
				name="'.$this->get_field_name('post_type').'[]"
				value="'.$post_type.'"';
				if( is_array( $instance['post_type'])){
	            	if( in_array($post_type, $instance['post_type'] ) ) echo 'checked="checked"';
				}
            echo ' /> '.$vars->labels->name.'';
        }
        ?>
    </select>
</p>

http://ww.wp.xz.cn/extend/plugins/latest-custom-post-type-updates/