After merge fix and a safety fix for handler

sql/sql_handler.cc:
  Move lock tables before conditions as lock tables may reopen tables
sql/sql_trigger.cc:
  After merge fix

sql/sql_handler.cc

@@ -414,6 +414,13 @@ bool mysql_ha_read(THD *thd, TABLE_LIST *tables,
   }
   tables->table=table;
 
+  HANDLER_TABLES_HACK(thd);
+  lock= mysql_lock_tables(thd, &tables->table, 1, 0, &not_used);
+  HANDLER_TABLES_HACK(thd);
+
+  if (!lock)
+    goto err0; // mysql_lock_tables() printed error message already
+
   if (cond && ((!cond->fixed &&
                 cond->fix_fields(thd, &cond)) || cond->check_cols(1)))
     goto err0;
@@ -427,13 +434,6 @@ bool mysql_ha_read(THD *thd, TABLE_LIST *tables,
     }
   }
 
-  HANDLER_TABLES_HACK(thd);
-  lock= mysql_lock_tables(thd, &tables->table, 1, 0, &not_used);
-  HANDLER_TABLES_HACK(thd);
-
-  if (!lock)
-    goto err0; // mysql_lock_tables() printed error message already
-
   if (insert_fields(thd, &thd->lex->select_lex.context,
                     tables->db, tables->alias, &it, 0))
     goto err0;

sql/sql_trigger.cc

@@ -1189,9 +1189,10 @@ bool Table_triggers_list::process_triggers(THD *thd, trg_event_type event,
       save_query_tables_own_last= thd->lex->query_tables_own_last;
       thd->lex->query_tables_own_last= 0;
 
-      res= check_table_access(thd, SELECT_ACL | UPDATE_ACL, &table_list, 0);
+      err_status= check_table_access(thd, SELECT_ACL | UPDATE_ACL,
+                                     &table_list, 0);
       thd->lex->query_tables_own_last= save_query_tables_own_last;
-      if (res)
+      if (err_status)
       {
         sp_restore_security_context(thd, save_ctx);
         return TRUE;