Splitter: Does not accept 0 as a valid value

[K3TH3R]

Describe the bug

The splitter component does not allow you to set 0 as a valid value for the size property. On these lines here, if the size property is set to 0, it would evaluate it false, making the panelnitialSize to be null, which on the next line would set it's width to 33% (100 / 3 panels).

Reproducer

https://stackblitz.com/edit/primevue-4-vite-issue-template-6hwcyho7?file=src%2FApp.vue&file=src%2Fmain.js

PrimeVue version

4.2.4

Vue version

4.x

Language

TypeScript

Build / Runtime

Vite

Browser(s)

No response

Steps to reproduce the behavior

If you click the button in the reproduction case, you'll see that the size property toggles between 20 and 0 on push. When the size = 0 we would expect the splitter panel on the left to disappear, not to expand to 33%.

Expected behavior

Having adjustable panels like this that you can toggle their expansion on/off is quite a common feature in modern apps and, given that 0 is technically an actual width, this seems to be a bug. I would expect that I should be able to put 0 as an actual width in order to hide that splitter panel.