From 83e23f328715aa992d488efba71f9c0c887ac12b Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Wed, 31 Jan 1996 05:26:59 +0000
Subject: (diskfs_node_rdwr): Handle null AMTREAD.

---
 libdiskfs/node-rdwr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libdiskfs/node-rdwr.c b/libdiskfs/node-rdwr.c
index 888f2497..79c94f8d 100644
--- a/libdiskfs/node-rdwr.c
+++ b/libdiskfs/node-rdwr.c
@@ -58,7 +58,10 @@ diskfs_node_rdwr (struct node *np,
 	amt = np->dn_stat.st_size - off;
     }
 
-  *amtread = amt;
+  if (amtread)
+    *amtread = amt;
+  else
+    amtread = &amt;
   err = _diskfs_rdwr_internal (np, data, off, amtread, dir, 0);
   if (*amtread && diskfs_synchronous)
     {
-- 
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