minetest/minetest — pull request #1155 by CiaranG (2014-02-21 18:13:21+00:00)
Title: Make form dropdown notify server on change

In the same way as already done for existing controls, this makes the client notify the server (so an on_receive_fields callback is made) when a new value is selected in a DropDown field on a formspec. It also fixes a potential crash (null pointer) during the creation of a DropDown.