livetree: simplify condition in get_node_by_path

The "strlen && strprefixeq" check in get_node_by_path is
excessive, since strlen is checked in strprefixeq macro
internally. Thus, "strlen(child->name) == p-path"
conjunct duplicates after macro expansion and could
be removed.

Signed-off-by: Denis Efremov <efremov@linux.com>
Message-Id: <20190827204148.20604-1-efremov@linux.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

livetree.c

@@ -526,8 +526,7 @@ struct node *get_node_by_path(struct node *tree, const char *path)
 	p = strchr(path, '/');
 
 	for_each_child(tree, child) {
-		if (p && (strlen(child->name) == p-path) &&
-		    strprefixeq(path, p - path, child->name))
+		if (p && strprefixeq(path, p - path, child->name))
 			return get_node_by_path(child, p+1);
 		else if (!p && streq(path, child->name))
 			return child;