This is a backport from 10.2 where it fixes the
cmake -DWITH_ASAN test failure that was mentioned
in commit f9cc3918
(merging MDEV-12253 from 10.1 to 10.2).

fil_parse_write_crypt_data(): If the tablespace is not found,
invoke fil_space_destroy_crypt_data(&crypt_data) to properly
free the created object.