add -n flag to inferno color

grass/buffers_cost.html

@@ -100,7 +100,7 @@ <h4>Compute cumulative cost surface to a given accident site based on speed limi
 v.to.rast streets_wake output=streets_speedtmp use=attr attrcolumn=SPEED type=line
 r.mapcalc "streets_speed = if(isnull(streets_speedtmp),5,streets_speedtmp)"
 r.info streets_speed
-r.colors streets_speed color=inferno
+r.colors -n streets_speed color=inferno
 d.rast streets_speed
 d.legend streets_speed at=5,40,2,5 use=5,25,35,45,65
 d.out.file myspeedmap