Prevent array to string error.

Author: Guisardo

classes/Hook/HookDisplayFooter.php

@@ -28,6 +28,8 @@
 use PrestaShop\Module\Ps_Googleanalytics\Wrapper\ProductWrapper;
 use Ps_Googleanalytics;
 use Tools;
+use RecursiveIteratorIterator;
+use RecursiveArrayIterator;
 
 class HookDisplayFooter implements HookInterface
 {
@@ -70,6 +72,11 @@ public function run()
                         $gacart['quantity'] = abs($gacart['quantity']);
                         $gaScripts .= 'MBG.removeFromCart(' . json_encode($gacart) . ');';
                     }
+                } elseif (is_array($gacart)) {
+                    $it = new RecursiveIteratorIterator(new RecursiveArrayIterator($gacart));
+                    foreach($it as $v) {
+                      $gaScripts .= $v;
+                    }
                 } else {
                     $gaScripts .= $gacart;
                 }