v-else hydrate inconsistency
[issue link]Problem
Using v-if and v-else directives to conditionally output a single root element for a component template fails if the v-else directive is attached to an HTML element, but works as expected when attached to a component.
Tested in latest Chrome, Firefox, and Safari on macOS 10.12 with Nuxt v1.0.0-rc11.
Minimal, reproducible example
https://github.com/alexcruice/nuxt-v-else
Screenshots
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