simple subselects ported to new select_lex structures

include/mysqld_error.h:
  simple subselects
libmysqld/Makefile.am:
  simple subselects
sql/Makefile.am:
  simple subselects
sql/item.h:
  simple subselects
sql/item_strfunc.h:
  simple subselects
sql/share/czech/errmsg.txt:
  simple subselects
sql/share/danish/errmsg.txt:
  simple subselects
sql/share/dutch/errmsg.txt:
  simple subselects
sql/share/english/errmsg.txt:
  simple subselects
sql/share/estonian/errmsg.txt:
  simple subselects
sql/share/french/errmsg.txt:
  simple subselects
sql/share/german/errmsg.txt:
  simple subselects
sql/share/greek/errmsg.txt:
  simple subselects
sql/share/hungarian/errmsg.txt:
  simple subselects
sql/share/italian/errmsg.txt:
  simple subselects
sql/share/japanese/errmsg.txt:
  simple subselects
sql/share/korean/errmsg.txt:
  simple subselects
sql/share/norwegian-ny/errmsg.txt:
  simple subselects
sql/share/norwegian/errmsg.txt:
  simple subselects
sql/share/polish/errmsg.txt:
  simple subselects
sql/share/portuguese/errmsg.txt:
  simple subselects
sql/share/romanian/errmsg.txt:
  simple subselects
sql/share/russian/errmsg.txt:
  simple subselects
sql/share/slovak/errmsg.txt:
  simple subselects
sql/share/spanish/errmsg.txt:
  simple subselects
sql/share/swedish/errmsg.txt:
  simple subselects
sql/share/ukrainian/errmsg.txt:
  simple subselects
sql/sql_class.cc:
  simple subselects
sql/sql_class.h:
  simple subselects
sql/sql_lex.cc:
  simple subselects
sql/sql_select.cc:
  simple subselects
sql/sql_select.h:
  simple subselects
sql/sql_union.cc:
  simple subselects
sql/sql_yacc.yy:
  simple subselects

include/mysqld_error.h

@@ -243,4 +243,6 @@
 #define ER_MIXING_NOT_ALLOWED 1224
 #define ER_DUP_ARGUMENT 1225
 #define ER_USER_LIMIT_REACHED 1226
-#define ER_ERROR_MESSAGES 227
+#define ER_SUBSELECT_NO_1_COL 1227
+#define ER_SUBSELECT_NO_1_ROW 1228
+#define ER_ERROR_MESSAGES 229