ls-tree: rename "retval" to "recurse" in "show_tree()"

The variable which "show_tree()" return is named "retval", a name that's
a little hard to understand. The commit rename "retval" to "recurse"
which is a more meaningful name than before in the context. We do not
need to take a look at "read_tree_at()" in "tree.c" to make sure what
does "retval" mean.

Signed-off-by: Teng Long <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: dyrone

builtin/ls-tree.c

@@ -64,17 +64,17 @@ static int show_recursive(const char *base, size_t baselen, const char *pathname
 static int show_tree(const struct object_id *oid, struct strbuf *base,
 		const char *pathname, unsigned mode, void *context)
 {
-	int retval = 0;
+	int recurse = 0;
 	size_t baselen;
 	enum object_type type = OBJ_BLOB;
 
 	if (S_ISGITLINK(mode)) {
 		type = OBJ_COMMIT;
 	} else if (S_ISDIR(mode)) {
 		if (show_recursive(base->buf, base->len, pathname)) {
-			retval = READ_TREE_RECURSIVE;
+			recurse = READ_TREE_RECURSIVE;
 			if (!(ls_options & LS_SHOW_TREES))
-				return retval;
+				return recurse;
 		}
 		type = OBJ_TREE;
 	}
@@ -109,7 +109,7 @@ static int show_tree(const struct object_id *oid, struct strbuf *base,
 				   chomp_prefix ? ls_tree_prefix : NULL,
 				   stdout, line_termination);
 	strbuf_setlen(base, baselen);
-	return retval;
+	return recurse;
 }
 
 int cmd_ls_tree(int argc, const char **argv, const char *prefix)