fix(v-scroll): check if property exists before destructuring
fix(v-scroll): check if property exists before destructuring

during development, hot reload would call the unbind hook when rebuilding elements using `v-scroll`.
This was throwing an error if it had already been removed

Phlow2001/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify,Webifi/vuetify,Webifi/vuetify,Webifi/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify