The battstat applet is broken under NetBSD (and probably under _all_ other BSDs)
because some of the changes done recently in the development branch of
gnome-applets.  All the problems are found in the battstat_applet.c file.

First of all, it includes acpi-linux.h.  Obviously, this is to be used _only_
under Linux; the code does well in not using any of the functions defined in it
when building outside Linux, but the header is included unconditionally.  So it
has to be included only under Linux.

Second, there are several problems caused by a typedef.  I've tried several
different combinations, but never got a correct solution, so I ended up
switching it to a #define.

At last, the code tries to use a member of the apm_power_info structure that
does not exist.  It seems to be a typo.