Work on revenue stamp feature.

htdocs/core/class/commonobject.class.php

@@ -1509,6 +1509,9 @@ abstract class CommonObject
                 $this->total_localtax2 += $obj->total_localtax2;
                 $this->total_ttc       += $obj->total_ttc;
 
+                // Add revenue stamp to total
+                $this->total_ttc       += isset($this->revenuestamp)?$this->revenuestamp:0;
+                
                 // Check if there is a global invoice tax for this vat rate
                 // FIXME: We should have no database access into this function. Also localtax 7 seems to have problem so i add condition to avoid it into standard usage without loosing it.
                 if (! empty($conf->global->MAIN_USE_LOCALTAX_TYPE_7))