removed (debugging?) print statement to avoid print RED
for each 'co r' command.

Reference: /n/sources/patch/applied/libplot-subr-dbgprint
Date: Sat Oct 16 06:30:40 CES 2004

--- /sys/src/cmd/plot/libplot/subr.c	Sat Oct 16 06:30:40 2004
+++ /sys/src/cmd/plot/libplot/subr.c	Sat Oct 16 06:30:40 2004
@@ -26,7 +26,6 @@
 		case 'k':  case 'z':	/* zero was old name for kblack */
 			return(DBlack);
 		case 'r':
-print("RED");
 			return(DRed);
 		case 'g': 
 			return(DGreen);