OpenDungeons/OpenDungeons — pull request #410 by Bertram25 (2014-12-31 08:13:04+00:00)
Title: NULL->nullptr commit.

- I only change NULL into nullptr in OD source files, neither in AS ones nor in level files, for the record.
- I also fixed a member name not following conventions in the GUI class, and removed a useless friendship
with the minimap.