Update woocommerce-quick-donation.php

woocommerce-quick-donation.php

@@ -95,6 +95,7 @@ class WooCommerce_Quick_Donation {
     public function check_donation_exists_cart(){
         global $woocommerce;
         $found = false;
+        if(is_null($woocommerce)){return $found;}
         if(empty($woocommerce)) {return;}
         if( sizeof($woocommerce->cart->get_cart()) > 0){
             foreach($woocommerce->cart->get_cart() as $cart_item_key=>$values){