Fix typo in AO_REAL_NEXT_PTR comment (atomic_ops_stack.h)

* src/atomic_ops_stack.h [AO_USE_ALMOST_LOCK_FREE] (AO_REAL_NEXT_PTR):
Fix typo ("either NULL") in the comment.

diff --git a/src/atomic_ops_stack.h b/src/atomic_ops_stack.h
index a71b61b275a01cd9a686935d265714a37aa43c0e..32bef7ce46ef8e309a1d19bd4783d95ff4eaf838 100644 (file)
--- a/src/atomic_ops_stack.h
+++ b/src/atomic_ops_stack.h
@@ -98,7 +98,7 @@ typedef struct AO__stack_aux {
 /* link fields in nodes, and nothing about the rest of the      */
 /* stack elements.  Link fields hold an AO_t, which is not      */
 /* necessarily a real pointer.  This converts the AO_t to a     */
-/* real (AO_t *) which is either o, or points at the link       */
+/* real (AO_t *) which is either NULL, or points at the link    */
 /* field in the next node.                                      */
 #define AO_REAL_NEXT_PTR(x) (AO_t *)((x) & ~AO_BIT_MASK)