Property Search Widget Shortcode has empty $post

Hello,

Just wanted to flag this warning I’ve been seeing in my logs;

[18-Apr-2017 20:26:54 UTC] PHP Notice: Trying to get property of non-object in /wp-content/plugins/wp-property/lib/shortcodes/property-search.php on line 134

It seems to be the fact the $post object is empty so the $post->ID is unavailable for this line;
$widget_id = $post->ID . "_search";

Might want to update it with a quick check, something like this;

if (!empty($post)) {
    $widget_id = $post->ID . "_search";
} else {
    $widget_id = "property_search";        	
}

Thank you