Pass data even when deleted_by is not present

[ever0de]

sled storage bug(reported by @devgony, fixed by @panarch)

Before

gluesql> create table foo(id int primary key);
Table created

gluesql> insert into foo values(1),(2);
2 rows inserted

gluesql> delete from foo where id =1 ;
1 row deleted

gluesql> insert into foo values(1);
data: SnapshotItem { data: Vec([I64(1)]), created_by: 3, deleted_by: Some(4) }
1 row inserted

gluesql> select * from foo;
| id |
|----|
| 2  |

gluesql> insert into foo values(1);
data: SnapshotItem { data: Vec([I64(1)]), created_by: 3, deleted_by: Some(4) }
1 row inserted

gluesql> select * from foo;
| id |
|----|
| 2  |

[coveralls]

Pull Request Test Coverage Report for Build 4391189274

• 48 of 48 (100.0%) changed or added relevant lines in 2 files are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.07%) to 98.813%

---

Files with Coverage Reduction	New Missed Lines	%
core/src/executor/insert.rs	6	96.74%

Totals
Change from base Build 4336544732:	0.07%
Covered Lines:	39545
Relevant Lines:	40020

---

💛 - Coveralls

[panarch]

Good fix! Thanks a lot 👍 👍 👍