Merge pull request #1140 from mathisonian/patch-1

fix error with undefined callback

src/socket.io/admin.js

@@ -120,7 +120,7 @@ SocketAdmin.categories.create = function(socket, data, callback) {
 
 SocketAdmin.categories.update = function(socket, data) {
 	if(!data) {
-		return callback(new Error('invalid data'));
+		throw new Error('invalid data');
 	}
 
 	admin.categories.update(data, socket);
@@ -380,4 +380,4 @@ SocketAdmin.groups.update = function(socket, data, callback) {
 	});
 };
 
-module.exports = SocketAdmin;
+module.exports = SocketAdmin;