&& (prev->axes[a].cvs[n_common].category
!= cell->axes[a].cvs[n_common].category
|| !value_equal (&prev->axes[a].cvs[n_common].value,
&cell->axes[a].cvs[n_common].value,
&& (prev->axes[a].cvs[n_common].category
!= cell->axes[a].cvs[n_common].category
|| !value_equal (&prev->axes[a].cvs[n_common].value,
&cell->axes[a].cvs[n_common].value,