### What?
This PR solves an issue with validation of the `point` field in Payload
CMS. If the value is `null` and the field is not required, the
validation will return `true` before trying to examine the contents of
the field
### Why?
If the point field is given a value, and saved, it is then impossible to
successfully "unset" the point field, either through the CMS UI or
through a hook like `beforeChange`. Trying to do so will throw this
error:
```
[17:09:41] ERROR: Cannot read properties of null (reading '0')
err: {
"type": "TypeError",
"message": "Cannot read properties of null (reading '0')",
"stack":
TypeError: Cannot read properties of null (reading '0')
at point (webpack-internal:///(rsc)/./node_modules/.pnpm/payload@3.43.0_graphql@16.10.0_typescript@5.7.3/node_modules/payload/dist/fields/validations.js:622:40)
```
because a value of `null` will not be changed to the default value of
`['','']`, which in any case does not pass MongoDB validation either.
```
[17:22:49] ERROR: Cast to [Number] failed for value "[ NaN, NaN ]" (type string) at path "location.coordinates.0" because of "CastError"
err: {
"type": "CastError",
"message": "Cast to [Number] failed for value \"[ NaN, NaN ]\" (type string) at path \"location.coordinates.0\" because of \"CastError\"",
"stack":
CastError: Cast to [Number] failed for value "[ NaN, NaN ]" (type string) at path "location.coordinates.0" because of "CastError"
at SchemaArray.cast (webpack-internal:///(rsc)/./node_modules/.pnpm/mongoose@8.15.1_@aws-sdk+credential-providers@3.778.0/node_modules/mongoose/lib/schema/array.js:414:15)
```
### How?
This adds a check to the top of the `point` validation function and
returns early before trying to examine the contents of the point field
---------
Co-authored-by: Dave Ryan <dmr@Daves-MacBook-Pro.local>
2da6d924de