DatePicker: Pick month does not work

[thealvert]

Describe the bug

The problem occurs when you have selectionMode as range and the modelValue as an empty array ([]). If you try to change the month it does not work.

Reproducer

https://stackblitz.com/edit/primevue-4-vite-issue-template-wo9pte?file=src%2FApp.vue

PrimeVue version

4.0.5

Vue version

4.x

Language

ALL

Build / Runtime

Vite

Browser(s)

No response

Steps to reproduce the behavior

1. set selectionMode: range
2. set modelValue with an empty array []
3. try to select a month

Expected behavior

No response