*.[ch] *_INIT macros: use { 0 } for a "zero out" idiom

In C it isn't required to specify that all members of a struct are
zero'd out to 0, NULL or '\0', just providing a "{ 0 }" will
accomplish that.

Let's also change code that provided N zero'd fields to just
provide one, and change e.g. "{ NULL }" to "{ 0 }" for
consistency. I.e. even if the first member is a pointer let's use "0"
instead of "NULL". The point of using "0" consistently is to pick one,
and to not have the reader wonder why we're not using the same pattern
everywhere.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 5336daf..deca75c 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -307,7 +307,7 @@ struct module_list {
 	const struct cache_entry **entries;
 	int alloc, nr;
 };
-#define MODULE_LIST_INIT { NULL, 0, 0 }
+#define MODULE_LIST_INIT { 0 }
 
 static int module_list_compute(int argc, const char **argv,
 			       const char *prefix,
@@ -588,7 +588,7 @@ struct init_cb {
 	const char *prefix;
 	unsigned int flags;
 };
-#define INIT_CB_INIT { NULL, 0 }
+#define INIT_CB_INIT { 0 }
 
 static void init_submodule(const char *path, const char *prefix,
 			   unsigned int flags)
@@ -717,7 +717,7 @@ struct status_cb {
 	const char *prefix;
 	unsigned int flags;
 };
-#define STATUS_CB_INIT { NULL, 0 }
+#define STATUS_CB_INIT { 0 }
 
 static void print_status(unsigned int flags, char state, const char *path,
 			 const struct object_id *oid, const char *displaypath)
@@ -911,13 +911,13 @@ struct module_cb {
 	char status;
 	const char *sm_path;
 };
-#define MODULE_CB_INIT { 0, 0, NULL, NULL, '\0', NULL }
+#define MODULE_CB_INIT { 0 }
 
 struct module_cb_list {
 	struct module_cb **entries;
 	int alloc, nr;
 };
-#define MODULE_CB_LIST_INIT { NULL, 0, 0 }
+#define MODULE_CB_LIST_INIT { 0 }
 
 struct summary_cb {
 	int argc;
@@ -928,7 +928,7 @@ struct summary_cb {
 	unsigned int files: 1;
 	int summary_limit;
 };
-#define SUMMARY_CB_INIT { 0, NULL, NULL, 0, 0, 0, 0 }
+#define SUMMARY_CB_INIT { 0 }
 
 enum diff_cmd {
 	DIFF_INDEX,
@@ -1334,7 +1334,7 @@ struct sync_cb {
 	const char *prefix;
 	unsigned int flags;
 };
-#define SYNC_CB_INIT { NULL, 0 }
+#define SYNC_CB_INIT { 0 }
 
 static void sync_submodule(const char *path, const char *prefix,
 			   unsigned int flags)
@@ -1480,7 +1480,7 @@ struct deinit_cb {
 	const char *prefix;
 	unsigned int flags;
 };
-#define DEINIT_CB_INIT { NULL, 0 }
+#define DEINIT_CB_INIT { 0 }
 
 static void deinit_submodule(const char *path, const char *prefix,
 			     unsigned int flags)