SDL enhancements:

- remove infinite loop after exit()
- make sure picture_surface is initialized, and free it
- split gui_message_loop() in 3 functions and change prototype
- some code is only used in simulator

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27366 a1c6a512-1295-4272-9138-f99709370657
3 files changed