Fix #2899: Reintroduce missing field

htdocs/install/mysql/tables/llx_actioncomm.sql

@@ -41,6 +41,7 @@ create table llx_actioncomm
   fk_contact		integer,
   fk_parent			integer NOT NULL default 0,
   fk_user_action	integer,						-- user id of owner of action (note that assigned users to event are store into another table)
+  fk_user_done		integer,						-- user id of user that has made action (deprecated)
 
   transparency      integer,						-- transparency (ical standard). used to say if user assigned to event are busy or not by event. This field may be deprecated if we want to store transparency for each assigned user, so into table llx_actioncomm_resources.