Add "rstcurv" table

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40960 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/colors.desc

@@ -25,6 +25,7 @@ precipitation: precipitation color table (0..2000mm)
 rainbow: rainbow color table
 ramp: color ramp
 random: random color table
+rstcurv: for terrain curvatures (from r.resamp.rst)
 ryb: red through yellow to blue
 ryg: red through yellow to green
 sepia: yellowish-brown through to white

lib/gis/colors/rstcurv

@@ -0,0 +1,9 @@
+0% purple
+-0.01 blue
+-0.001 indigo
+-0.00001 cyan
+0 200:255:200
+0.00001 yellow
+0.001 orange
+0.01 red
+100% 255:0:200