merging

mysql-test/t/disabled.def:
  meging bug

mysql-test/t/disabled.def

@@ -32,3 +32,4 @@ rpl_multi_engine         : BUG#22583 2006-09-23 lars
 #ndb_binlog_ddl_multi     : BUG#18976 2006-04-10 kent    CRBR: multiple binlog, second binlog may miss schema log events
 ndb_binlog_discover      : bug#21806 2006-08-24
 ndb_autodiscover3        : bug#21806
+udf                      : for GKodinov to fix. Your fix for #21809 stopped working in 5.1 after the merge.

sql/item_subselect.cc

@@ -1682,7 +1682,7 @@ void subselect_engine::set_row(List<Item> &item_list, Item_cache **row)
     res_field_type= sel_item->field_type();
     item->decimals= sel_item->decimals;
     item->unsigned_flag= sel_item->unsigned_flag;
-    *maybe_null= sel_item->maybe_null;
+    maybe_null= sel_item->maybe_null;
     if (!(row[i]= Item_cache::get_cache(res_type)))
       return;
     row[i]->setup(sel_item);

sql/sql_yacc.yy

@@ -798,7 +798,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %type <item_list>
 	expr_list udf_expr_list udf_expr_list2 when_list
 	ident_list ident_list_arg opt_expr_list
-        expr_list_opt
 
 %type <var_type>
         option_type opt_var_type opt_var_ident_type
@@ -6377,7 +6376,7 @@ function_call_generic:
           lex->current_select->udf_list.push_front(udf);
 #endif
         }
-        expr_list_opt ')'
+        opt_expr_list ')'
         {
           THD *thd= YYTHD;
           LEX *lex= Lex;