Copyright for 1992 added
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 76bfba2..00aa5eb 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -1,5 +1,5 @@
 /***********************************************************
-Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
+Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
 Netherlands.
 
                         All Rights Reserved