Add hook method to simply display child lines in order/invoice/propal

htdocs/core/class/commonobject.class.php

@@ -2566,6 +2566,11 @@ abstract class CommonObject
 					$parameters = array('line'=>$line,'var'=>$var,'num'=>$num,'i'=>$i,'dateSelector'=>$dateSelector,'seller'=>$seller,'buyer'=>$buyer,'selected'=>$selected, 'extrafieldsline'=>$extrafieldsline);
 					$reshook=$hookmanager->executeHooks('printObjectLine', $parameters, $this, $action);    // Note that $action and $object may have been modified by some hooks
 				}
+				else 
+				{
+					$parameters = array('line'=>$line,'var'=>$var,'num'=>$num,'i'=>$i,'dateSelector'=>$dateSelector,'seller'=>$seller,'buyer'=>$buyer,'selected'=>$selected, 'extrafieldsline'=>$extrafieldsline);
+					$reshook=$hookmanager->executeHooks('printObjectSubLine', $parameters, $this, $action);    // Note that $action and $object may have been modified by some hooks
+				}
 			}
 			else
 			{