DateTime64: out of bound array access, garbage results.

```
milovidov-desktop :) SELECT toString(toDateTime('-922337203.6854775808', 1))

SELECT toString(toDateTime('-922337203.6854775808', 1))

Query id: 3d51ba80-4993-4f64-b6ef-da0c0f1bdf43

┌─toString(toDateTime('-922337203.6854775808', 1))─┐
│ 2106-02-07 :rE:�.6                                │
└──────────────────────────────────────────────────┘
```