Issue4141/2: Use Xxx:is_smob instead of Xxx:unsmob when used in boolean contexts

This saves a memory access and comparison and leads to better code
even when unsmob is called afterwards anyway.

1 files changed, 1 insertions, 1 deletions

diff --git a/lily/item-scheme.cc b/lily/item-scheme.cc
index 0887ac3d9a..58b98b29f5 100644
--- a/lily/item-scheme.cc
+++ b/lily/item-scheme.cc
@@ -35,7 +35,7 @@ LY_DEFINE (ly_item_break_dir, "ly:item-break-dir",
            " end of line, @code{0}@tie{}unbroken, and"
            " @code{1}@tie{}beginning of line.")
 {
-  LY_ASSERT_TYPE (Item::unsmob, it, 1);
+  LY_ASSERT_SMOB (Item, it, 1);
   Item *me = Item::unsmob (it);
   return scm_from_int (me->break_status_dir ());
 }