Don't die on unknown LS_COLORS values

--- tcsh-6.14.00.orig/tw.color.c

+++ tcsh-6.14.00/tw.color.c

@@ -235,13 +235,10 @@

 		    if ((Char)variables[i].variable[0] == (v[0] & CHAR) &&

 			(Char)variables[i].variable[1] == (v[1] & CHAR))

 			break;

-		if (i < nvariables) {

-		    v += 3;

+		v += 3;

+		if (i < nvariables)

 		    getstring(&c, &v, &variables[i].color, ':');

-		    continue;

-		}

-		else

-		    stderror(ERR_BADCOLORVAR, v[0], v[1]);

+		continue;

 	    }

 	    break;

 	}