OScommerce - Solution of "product_qa" error

Error:
Warning: array_merge() [function.array-merge]: Argument #2 is not an array in C:\wamp\www\admin\product_aq.php on line 190
line 190 $rInfo_array = array_merge($questions, $answers,$products, $products_name);
Warning: reset() [function.reset]: Passed variable is not an array or object in C:\wamp\www\admin\includes\classes\object_info.php on line 17
line 17 reset($object_array);
Warning: Variable passed to each() is not an array or object in C:\wamp\www\admin\includes\classes\object_info.php on line 18
line 18 while (list($key, $value) = each($object_array)) {

Solution:
開啟admin/product_aq.php
將裡面的：
$rInfo_array = array_merge($questions, $answers,$products, $products_name);
全數改為：(有4個地方要改)
$rInfo_array = array_merge((array)$questions, (array)$answers,(array)$products, (array)$products_name);