gnome-bluetooth: Fix build erorrs found with gcc 4.8

Fix errors like below

| bluetooth-input.c:193:4: error: format '%d' expects argument of type
'int', but argument 5 has type 'XID' [-Werror=format=]
|     g_message ("has mouse: %s (id = %d)", device_info[i].name,
device_info[i].id);
|     ^
| bluetooth-input.c:198:4: error: format '%d' expects argument of type
'int', but argument 5 has type 'XID' [-Werror=format=]
|     g_message ("has keyboard: %s (id = %d)", device_info[i].name,
device_info[i].id);
|     ^

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>