Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer

Many call sites use strbuf_init(&foo, 0) to initialize local
strbuf variable "foo" which has not been accessed since its
declaration. These can be replaced with a static initialization
using the STRBUF_INIT macro which is just as readable, saves a
function call, and takes up fewer lines.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
diff --git a/builtin-clone.c b/builtin-clone.c
index 49d2eb9..1ddc14b 100644
--- a/builtin-clone.c
+++ b/builtin-clone.c
@@ -264,10 +264,9 @@
 
 static void remove_junk(void)
 {
-	struct strbuf sb;
+	struct strbuf sb = STRBUF_INIT;
 	if (getpid() != junk_pid)
 		return;
-	strbuf_init(&sb, 0);
 	if (junk_git_dir) {
 		strbuf_addstr(&sb, junk_git_dir);
 		remove_dir_recursively(&sb, 0);
@@ -354,7 +353,7 @@
 	char *path, *dir;
 	const struct ref *refs, *head_points_at, *remote_head, *mapped_refs;
 	char branch_top[256], key[256], value[256];
-	struct strbuf reflog_msg;
+	struct strbuf reflog_msg = STRBUF_INIT;
 	struct transport *transport = NULL;
 	char *src_ref_prefix = "refs/heads/";
 
@@ -404,7 +403,6 @@
 	if (!stat(dir, &buf))
 		die("destination directory '%s' already exists.", dir);
 
-	strbuf_init(&reflog_msg, 0);
 	strbuf_addf(&reflog_msg, "clone: from %s", repo);
 
 	if (option_bare)
@@ -526,7 +524,7 @@
 		create_symref("HEAD", head_points_at->name, NULL);
 
 		if (!option_bare) {
-			struct strbuf head_ref;
+			struct strbuf head_ref = STRBUF_INIT;
 			const char *head = head_points_at->name;
 
 			if (!prefixcmp(head, "refs/heads/"))
@@ -539,7 +537,6 @@
 				   head_points_at->old_sha1,
 				   NULL, 0, DIE_ON_ERR);
 
-			strbuf_init(&head_ref, 0);
 			strbuf_addstr(&head_ref, branch_top);
 			strbuf_addstr(&head_ref, "HEAD");