FIX remove db object for avoid error with postgresql

htdocs/variants/ajax/get_attribute_values.php

@@ -77,6 +77,11 @@ $prodattrval = new ProductAttributeValue($db);
 
 $res = $prodattrval->fetchAllByProductAttribute($id);
 
+// Remove db for avoid error with postgresql
+foreach ($res as $key => $val) {
+	unset($res[$key]->db);
+}
+
 if ($res == -1) {
 	print json_encode(array(
 		'error' => 'Internal error'

htdocs/variants/combinations.php

@@ -477,8 +477,9 @@ if (!empty($id) || !empty($ref)) {
 
 			foreach ($prodattr_all as $each) {
 				$prodattr_alljson[$each->id] = $each;
+				// Remove db for avoid error with postgresql
+				unset($prodattr_alljson[$each->id]->db);
 			}
-
 			?>
 
 		<script type="text/javascript">