--- code/trunk/study.c	2007/02/24 21:38:09	7
+++ code/trunk/study.c	2007/02/24 21:38:25	15
@@ -9,7 +9,7 @@
 
 Written by: Philip Hazel <ph10@cam.ac.uk>
 
-           Copyright (c) 1997 University of Cambridge
+           Copyright (c) 1998 University of Cambridge
 
 -----------------------------------------------------------------------------
 Permission is granted to anyone to use this software for any purpose on any
@@ -208,6 +208,7 @@
       according to the repeat count. */
 
       case OP_CLASS:
+      case OP_NEGCLASS:
         {
         tcode++;
         for (c = 0; c < 32; c++) start_bits[c] |= tcode[c];