better control for compatibility code

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.73 2004/10/18 12:51:44 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.74 2005/01/10 17:31:50 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -15,6 +15,12 @@
 #include "lua.h"
 
 
+#if !LUA_COMPAT_GETN
+#define luaL_getn(L,i)          lua_objsize(L, i)
+#define luaL_setn(L,i,j)        ((void)0)  /* no op! */
+#endif
+
+
 /* extra error code for `luaL_load' */
 #define LUA_ERRFILE     (LUA_ERRERR+1)