Fix multi-slurp protection (#define was missing). (No I don't go around
looking at header files for minor problems like this; I was actually trying to
remind myself how to do it, and this was the first place I looked :-)
/* -----------------------------------------------------------------------------
- $Id: Arena.h,v 1.1 2001/10/18 14:41:01 simonmar Exp $
+ $Id: Arena.h,v 1.2 2003/07/28 16:16:07 moran Exp $
(c) The University of Glasgow 2001
Arena allocation interface.
-------------------------------------------------------------------------- */
#ifndef ARENA_H
+#define ARENA_H
// Abstract type of arenas
typedef struct _Arena Arena;