refs: use designated initializers for "struct ref_iterator_vtable"

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/refs/debug.c b/refs/debug.c
index b03a832..b83b581 100644
--- a/refs/debug.c
+++ b/refs/debug.c
@@ -220,8 +220,9 @@ static int debug_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable debug_ref_iterator_vtable = {
-	debug_ref_iterator_advance, debug_ref_iterator_peel,
-	debug_ref_iterator_abort
+	.advance = debug_ref_iterator_advance,
+	.peel = debug_ref_iterator_peel,
+	.abort = debug_ref_iterator_abort,
 };
 
 static struct ref_iterator *
diff --git a/refs/files-backend.c b/refs/files-backend.c
index f95552f..aa4e718 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -822,9 +822,9 @@ static int files_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable files_ref_iterator_vtable = {
-	files_ref_iterator_advance,
-	files_ref_iterator_peel,
-	files_ref_iterator_abort
+	.advance = files_ref_iterator_advance,
+	.peel = files_ref_iterator_peel,
+	.abort = files_ref_iterator_abort,
 };
 
 static struct ref_iterator *files_ref_iterator_begin(
@@ -2231,9 +2231,9 @@ static int files_reflog_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable files_reflog_iterator_vtable = {
-	files_reflog_iterator_advance,
-	files_reflog_iterator_peel,
-	files_reflog_iterator_abort
+	.advance = files_reflog_iterator_advance,
+	.peel = files_reflog_iterator_peel,
+	.abort = files_reflog_iterator_abort,
 };
 
 static struct ref_iterator *reflog_iterator_begin(struct ref_store *ref_store,
diff --git a/refs/iterator.c b/refs/iterator.c
index a89d132..b2e56ba 100644
--- a/refs/iterator.c
+++ b/refs/iterator.c
@@ -64,9 +64,9 @@ static int empty_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable empty_ref_iterator_vtable = {
-	empty_ref_iterator_advance,
-	empty_ref_iterator_peel,
-	empty_ref_iterator_abort
+	.advance = empty_ref_iterator_advance,
+	.peel = empty_ref_iterator_peel,
+	.abort = empty_ref_iterator_abort,
 };
 
 struct ref_iterator *empty_ref_iterator_begin(void)
@@ -201,9 +201,9 @@ static int merge_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable merge_ref_iterator_vtable = {
-	merge_ref_iterator_advance,
-	merge_ref_iterator_peel,
-	merge_ref_iterator_abort
+	.advance = merge_ref_iterator_advance,
+	.peel = merge_ref_iterator_peel,
+	.abort = merge_ref_iterator_abort,
 };
 
 struct ref_iterator *merge_ref_iterator_begin(
@@ -378,9 +378,9 @@ static int prefix_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable prefix_ref_iterator_vtable = {
-	prefix_ref_iterator_advance,
-	prefix_ref_iterator_peel,
-	prefix_ref_iterator_abort
+	.advance = prefix_ref_iterator_advance,
+	.peel = prefix_ref_iterator_peel,
+	.abort = prefix_ref_iterator_abort,
 };
 
 struct ref_iterator *prefix_ref_iterator_begin(struct ref_iterator *iter0,
diff --git a/refs/packed-backend.c b/refs/packed-backend.c
index 47f01fa..0300245 100644
--- a/refs/packed-backend.c
+++ b/refs/packed-backend.c
@@ -911,9 +911,9 @@ static int packed_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable packed_ref_iterator_vtable = {
-	packed_ref_iterator_advance,
-	packed_ref_iterator_peel,
-	packed_ref_iterator_abort
+	.advance = packed_ref_iterator_advance,
+	.peel = packed_ref_iterator_peel,
+	.abort = packed_ref_iterator_abort
 };
 
 static struct ref_iterator *packed_ref_iterator_begin(
diff --git a/refs/ref-cache.c b/refs/ref-cache.c
index be4aa5e..3080ef9 100644
--- a/refs/ref-cache.c
+++ b/refs/ref-cache.c
@@ -456,9 +456,9 @@ static int cache_ref_iterator_abort(struct ref_iterator *ref_iterator)
 }
 
 static struct ref_iterator_vtable cache_ref_iterator_vtable = {
-	cache_ref_iterator_advance,
-	cache_ref_iterator_peel,
-	cache_ref_iterator_abort
+	.advance = cache_ref_iterator_advance,
+	.peel = cache_ref_iterator_peel,
+	.abort = cache_ref_iterator_abort
 };
 
 struct ref_iterator *cache_ref_iterator_begin(struct ref_cache *cache,