bug#41808: 28.0.50; Various battery.el improvements

[Basil L. Contovounesios]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: "Basil L. Contovounesios" <contovob@tcd.ie>
>> Date: Thu, 11 Jun 2020 16:47:40 +0100
>> Cc: mattias engdegård <mattiase@acm.org>
>> 
>> -    ((fboundp 'w32-battery-status)
>> +        ((functionp 'w32-battery-status)
>>       #'w32-battery-status))
>
> Is something wrong with fboundp?  I think we have dozens if not
> hundreds of such uses of fboundp, so if something's wrong with it, we
> had better fixed them all.

The only reason I switched to functionp is because
battery-status-function is passed to funcall, but now that I think about
it again we're only checking whether the definition exists at all here,
so I reverted to fboundp.

Thanks,

-- 
Basil