diff -u old/gui.c gui.c
--- old/gui.c	Thu Jul 28 14:53:01 1994
+++ gui.c	Fri Jan 12 17:25:53 1996
@@ -646,7 +665,7 @@
 
 	    for(y=MARGIN; y<raw->height-MARGIN; y++)
 	    {
-		p = raw->data + (y * raw->width + MARGIN) * 3;
+		p = raw->data + y * raw->width + MARGIN * 3;
 
 		for(x=MARGIN; x<raw->width-MARGIN; x++)
 		{
Only in work: oldmain.c