correct historic mis-attribution of copyright
diff --git a/shared-core/sis_ds.c b/shared-core/sis_ds.c
index cc49c27..132ae6b 100644
--- a/shared-core/sis_ds.c
+++ b/shared-core/sis_ds.c
@@ -134,7 +134,7 @@
 
 /*
  * GLX Hardware Device Driver common code
- * Copyright (C) 1999 Keith Whitwell
+ * Copyright (C) 1999 Wittawat Yamwong
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),