[Fuze+][Manual] Fix compilation broken on oscilloscope

thanks to pixelma for having pointed this out

Change-Id: Iac8b997f42b8fb0f964f1f40ce1d2e7e286d4c04
Reviewed-on: http://gerrit.rockbox.org/404
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>
1 file changed