remove branches in dmark and dfree GC callbacks

dmark and dfree callbacks are never called in gc.c for NULL
DATA_PTR values, not even for zombie objects.

* compile.c (ibf_loader_mark): remove branch for pointer validity
* compile.c (ibf_loader_free): ditto
* cont.c (cont_free): ditto
* cont.c (fiber_free): ditto
* dir.c (dir_free): ditto
* ext/stringio/stringio.c (strio_mark): ditto
* proc.c (binding_free): ditto
* thread_sync.c (mutex_free): ditto
* vm.c (thread_free): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58006 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 3 deletions

diff --git a/dir.c b/dir.c
index 365f059b0f..9fc559756d 100644
--- a/dir.c
+++ b/dir.c
@@ -436,9 +436,8 @@ static void
 dir_free(void *ptr)
 {
     struct dir_data *dir = ptr;
-    if (dir) {
-	if (dir->dir) closedir(dir->dir);
-    }
+
+    if (dir->dir) closedir(dir->dir);
     xfree(dir);
 }