dummy: Fix dummy data copy
dummy: Fix dummy data copy

This will fix an issue coping the dummy data into ocean_spectra structure,
where we have lost 7/8 of data, because we did not pass the correct size.

Signed-off-by: Soeren Grunewald <080f3d39b0ddab49332ada0794c0adc5586d92a4@desy.de>

soerengrunewald/libocean,soerengrunewald/libocean