Better way to test for color

[v0dro]

GRruby-extension/lib/rubyplot/scripting_backends/gr/plots/bar.rb

Line 17 in 56240da

@bar_color = COLOR_INDEX[marker_color] if @bar_color.is_a? Symbol

A better way would be check would be to see if a key is actually present in the hash. Like
... if COLOR_INDEX.has_key?(marker)