[Libiberty]: Handle VMS as a LLP64 platform in splay-tree.h

[Tristan Gingold]

Hi,

unfortunately VMS (when 64bit pointers are used - which is nice for gcc) is 
also an LLP64 platform.
So I need to follow to Win64 way in splay-tree.h.

Tested manually by build (and using) gcc on ia64-hp-openvms.

Ok for trunk ?

Tristan.

include/
2012-04-04  Tristan Gingold  <ging...@adacore.com>

        * splay-tree.h: Use LLP64 definitions of libi_shostptr_t and
        libi_hostptr_t for VMS with 64bit pointers.

--- a/include/splay-tree.h
+++ b/include/splay-tree.h
@@ -37,7 +37,8 @@ extern "C" {
 
 #include "ansidecl.h"
 
-#ifndef _WIN64
+#if !(defined (_WIN64) \
+      || (defined (__VMS__) && __INITIAL_POINTER_SIZE == 64))
   typedef unsigned long int libi_uhostptr_t;
   typedef long int libi_shostptr_t;
 #else