Bug#1114796: upower: spams logs with value "-nan" of type 'gdouble' is invalid or out of range for property 'percentage' of type 'gdouble

[James Addison]

Package: upowerd
Followup-For: Bug #1114796

I'm encountering this on my laptop too.  The battery is not in good health, but
even so the log message is an annoyance.

This is with binary package upower/1.91.2-1 installed.