Bug - Pagination - Default `page` renders negative first index

[josemigallas]

Describe the problem
When omitting prop page (default value is 0) the first index is (0 - 1) * perPage + 1; -> 1 - perPage a negative number.

How do you reproduce the problem?

<Pagination itemCount={25} />

Expected behavior
First index should be 0.

Is this issue blocking you?
Set `page={1}´.

Screenshots

What is your environment?
@patternfly/react-core@4.276.8

Any other information?
The existing Pagination snapshots already confirm this bug:

patternfly-react/packages/react-core/src/components/Pagination/__tests__/__snapshots__/Pagination.test.tsx.snap

Line 2081 in ff94267

-19 - 20

[MariaAga]

This is also a bug in v5, I'll take a look