Fix that end_bulk_insert() doesn't write to to-be-deleted files

This affected mainly MyISAM and Aria engines.
Also fixed that end_bulk_insert() detects errors from
internal mi_end_bulk_insert() and ma_end_bulk_insert()

- delete_tree() and delete_tree_element() now has an
  extra argument that marks if future calls to
  tree->free should be ignored.
- tree->free changed to function returning int, to be
  able to signal errors.
- Restored deleting flag in MyISAM that was accidently
  disabled in mi_extra(PREPARE_FOR_DROP)

1 files changed, 1 insertions, 1 deletions

diff --git a/storage/myisam/ft_boolean_search.c b/storage/myisam/ft_boolean_search.c
index a44e24c9db1..dee57513912 100644
--- a/storage/myisam/ft_boolean_search.c
+++ b/storage/myisam/ft_boolean_search.c
@@ -1039,7 +1039,7 @@ void ft_boolean_close_search(FT_INFO *ftb)
 {
   if (is_tree_inited(& ftb->no_dupes))
   {
-    delete_tree(& ftb->no_dupes);
+    delete_tree(&ftb->no_dupes, 0);
   }
   free_root(& ftb->mem_root, MYF(0));
   my_free(ftb);