[PATCH] Fix ckpt_obj_lookup_add() leak detection logic

[Dan Smith <danms-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Since first is a pointer, it's never NULL and thus leak detection will
always be performed (of CHECKPOINT_SUBTREE is set).  This fatally breaks
the checkpoint process when that flag is enabled because any object (with
a ref_users operation) that is added to the hash twice will be reported as
a reverse leak.

Signed-off-by: Dan Smith <danms-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 checkpoint/objhash.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/checkpoint/objhash.c b/checkpoint/objhash.c
index 8dfb0b0..b85aa77 100644
--- a/checkpoint/objhash.c
+++ b/checkpoint/objhash.c
@@ -679,7 +679,7 @@ int ckpt_obj_lookup_add(struct ckpt_ctx *ctx, void *ptr,
 	ckpt_debug("%s objref %d first %d\n",
 		   obj->ops->obj_name, obj->objref, *first);
 
-	if (first && obj_reverse_leak(ctx, obj))
+	if (*first && obj_reverse_leak(ctx, obj))
 		return -EBUSY;
 
 	obj->flags |= CKPT_OBJ_VISITED;
-- 
1.6.2.5