builtin-init-db: use warning() instead of fprintf(stderr, "warning: ")

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-init-db.c

@@ -130,8 +130,7 @@ static void copy_templates(const char *template_dir)
 	}
 	dir = opendir(template_path);
 	if (!dir) {
-		fprintf(stderr, "warning: templates not found %s\n",
-			template_dir);
+		warning("templates not found %s", template_dir);
 		return;
 	}
 
@@ -144,8 +143,8 @@ static void copy_templates(const char *template_dir)
 
 	if (repository_format_version &&
 	    repository_format_version != GIT_REPO_VERSION) {
-		fprintf(stderr, "warning: not copying templates of "
-			"a wrong format version %d from '%s'\n",
+		warning("not copying templates of "
+			"a wrong format version %d from '%s'",
 			repository_format_version,
 			template_dir);
 		closedir(dir);