FIX : when we need to bill several orders, order lines unit is not on bill lines

htdocs/core/actions_massactions.inc.php

@@ -701,7 +701,10 @@ if ($massaction == 'confirm_createbills')
 							$lines[$i]->fk_fournprice,
 							$lines[$i]->pa_ht,
 							$lines[$i]->label,
-							$array_options
+							$array_options,
+							100,
+							0,
+							$lines[$i]->fk_unit
 							);
 						if ($result > 0)
 						{