geom_points are droppped if color = NA

[chrishaid]

WE used this in at least one plotting function (goal_strand_plot) where I've got a hack that allows us to use two different color scales for two different shapes (by using fill for one shape and color fo an other). The problem is caused by ggplot2 2.0 using a stroke argument now for shapes 21-24. Setting stroke = 0 solves the problem.

[chrishaid]

@almartin82 Do you know if we use color = NA anywhere else other than goal_strand_plot?