Bug: Handle null values in slice() with multiple arguments

[bigshika]

I ran into a bug where I had two notes:

Test
---
TestArray: 
---

Test2
---
TestArray: 
- item a
- item b
---

If I run:

dataview
TABLE slice(TestArray)

Both notes are returned.

If I run:

dataview
TABLE slice(TestArray, 0)

Only Test2 is returned.

This behaviour persists even if there's a null check involved on the property. My expectation is that the number of notes returned by the first and second queries would be the same.