bluetooth: Get name value from right message iterator

bluetooth: Get name value from right message iterator

We need to get name value from var instead of the container iter
else it may also cause neard crash:
process 1044: type variant 118 not a basic type
0  0xb7fe1424 in __kernel_vsyscall ()
1  0xb7bcfcc1 in raise () from /lib/libc.so.6
2  0xb7bd30ee in abort () from /lib/libc.so.6
3  0xb7da5045 in _dbus_abort () from /usr/lib/libdbus-1.so.3
4  0xb7d99f86 in _dbus_warn_check_failed () from /usr/lib/libdbus-1.so.3
5  0xb7d9bc9c in _dbus_marshal_read_basic () from /usr/lib/libdbus-1.so.3
6  0xb7d84e0f in _dbus_type_reader_read_basic () from /usr/lib/libdbus-1.so.3
7  0xb7d89f0b in dbus_message_iter_get_basic () from /usr/lib/libdbus-1.so.3
8  0x0806b638 in bt_adapter_property_changed (conn=0x80814c8,
    message=0x8081870, user_data=0x0) at src/bluetooth.c:445