Colormap error() calls now report the input variable which is a problem. * autumn.m, bone.m, colorcube.m, cool.m, copper.m, flag.m, gmap40.m, gray.m, hot.m, hsv.m, jet.m, lines.m, ocean.m, pink.m, prism.m, rainbow.m, spring.m, summer.m, white.m, winter.m: Colormap error() calls now report the input variable which is a problem.

--- a/scripts/image/bone.m
+++ b/scripts/image/bone.m
@@ -37,7 +37,7 @@
     n = rows (colormap);
   elseif (nargin == 1)
     if (! isscalar (n))
-      error ("bone: argument must be a scalar");
+      error ("bone: N must be a scalar");
     endif
   else
     print_usage ();