draw: remove extra parenthesis in elevation_color
draw: remove extra parenthesis in elevation_color

Former-commit-id: 272f08e17d6643c51bb9a9b117270f15ac2bafb0
esampson/worldengine,esampson/worldengine,sylvanmist/worldengine,sylvanmist/worldengine,tmfoltz/worldengine,Mindwerks/worldengine,tmfoltz/worldengine,psi29a/worldengine,MM1nd/worldengine,psi29a/worldengine,MM1nd/worldengine,Mindwerks/worldengine