* wo_plot.ncl: fix syntax

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* wo_plot_utils.ncl: load missing lib

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>
* wo_vars.ncl: place dummy (for now) procedure

Signed-off-by: Yakkala Yagnesh Raghava <hi@yagnesh.org>