Bluetooth: Mesh: Fix incorrect write conn_count

When Device use pb-gatt bearer provisioning, and first
provisioning failed due to some reasons(invalid oob etc..).

Which cause `proxy:gatt_disconnectd` incorrected write `conn_count`

Cause this var euqals `-1`.

Signed-off-by: Lingao Meng <menglingao@xiaomi.com>
1 file changed