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-rw-r--r--lib/bitset.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/bitset.h b/lib/bitset.h
index e5bb015b88..ea04916ea4 100644
--- a/lib/bitset.h
+++ b/lib/bitset.h
@@ -109,7 +109,7 @@ enum bitset_type bitset_type_choose (bitset_bindex, bitset_attrs);
/* Create a bitset of desired type and size. The bitset is zeroed. */
bitset bitset_alloc (bitset_bindex, enum bitset_type);
-/* Free bitset. */
+/* Free bitset. Do nothing if NULL. */
void bitset_free (bitset);
/* Create a bitset of desired type and size using an obstack. The
@@ -117,7 +117,7 @@ void bitset_free (bitset);
bitset bitset_obstack_alloc (struct obstack *bobstack,
bitset_bindex, enum bitset_type);
-/* Free bitset allocated on obstack. */
+/* Free bitset allocated on obstack. Do nothing if NULL. */
void bitset_obstack_free (bitset);
/* Create a bitset of desired size and attributes. The bitset is zeroed. */