* Fix bug [ 1696343 ] PO not saved if just custom column changed

dbPort/src/org/compiere/model/PO.java

@@ -1904,6 +1904,8 @@ public abstract class PO
 			if (m_newValues[i] != null)
 				return true;	//	something changed
 		}
+		if (m_custom.size() > 0)
+			return true; // there are custom columns modified
 		return false;
 	}	//	is_Change