vs-input-number render fails

[CheyenneForbes]

• OS
  Both Windows and Linux
• Node.js version
  Any, even on jsfiddle
• Vuesax version
  latest on NPM
• Which package manager did you use for the install?
  NPM, the issue is also on jsfiddle

reproduce:
https://jsfiddle.net/1hf2awju/

vue.js:633 [Vue warn]: Error in render: "TypeError: Cannot read property 'toString' of undefined"

found in

---> <VsInputNumber> at vsInputNumber.vue
       <Root>

[CheyenneForbes]

I created a fix, it was caused by passing a null to v-model #455