use _mesa_unmap_buffer by default
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 643a8c1..df5f6ac 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.1
+ * Version: 6.3
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
*
@@ -187,7 +187,7 @@
driver->BufferSubData = _mesa_buffer_subdata;
driver->GetBufferSubData = _mesa_buffer_get_subdata;
driver->MapBuffer = _mesa_buffer_map;
- driver->UnmapBuffer = NULL;
+ driver->UnmapBuffer = _mesa_buffer_unmap;
#endif
/* T&L stuff */