Bluetooth: MPL: Fix use of uninitialized command.param value
Bluetooth: MPL: Fix use of uninitialized command.param value

The command.param may not always be set in send_command
depending on whether command.use_param is set.

If command.use_param is not set, the command.param is
not logged, and is set to 0.

Signed-off-by: Emil Gydesen <a20314356615223738233ab4c4eb1cd8cd4146fa@nordicsemi.no>

finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr