am-utils-6.2 - fix SEGV on quick reply error

From: Ian Kent <raven@themaw.net>

Clearly a programming mistake on my part, odd it hasn't been seen
before ...

Signed-off-by: Ian Kent <raven@themaw.net>
---
 amd/nfs_subr.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/amd/nfs_subr.c b/amd/nfs_subr.c
index b88a40c8..c0ca0e42 100644
--- a/amd/nfs_subr.c
+++ b/amd/nfs_subr.c
@@ -1293,6 +1293,8 @@ nfs_quick_reply3(am_node *mp, int error)
   am_post_op_attr *post_op_obj;
   int ret;
 
+  post_op_dir = &result.res_u.ok.dir_attributes;
+
   if (error) {
     /*
      * Return the error that was passed to us.
@@ -1300,7 +1302,6 @@ nfs_quick_reply3(am_node *mp, int error)
     post_op_dir->attributes_follow = 0;
     result.status = nfs_error(error);
   } else {
-    post_op_dir = &result.res_u.ok.dir_attributes;
     post_op_obj = &result.res_u.ok.obj_attributes;
     am_fattr3 *fattr3;
     nfsfattr *fattr;