altoslib: Protect has_monitor_battery from unset product
authorKeith Packard <keithp@keithp.com>
Wed, 19 May 2021 17:52:47 +0000 (10:52 -0700)
committerKeith Packard <keithp@keithp.com>
Wed, 19 May 2021 17:53:45 +0000 (10:53 -0700)
AltosDroid can query has_monitor_battery before the product data has
been set.

Signed-off-by: Keith Packard <keithp@keithp.com>

No differences found