* Use set_msg(char*) to write a new message to the screen, replacing the
* previous one. The message can be at most 255 characters long. Use
* set_wrap_mode with one of the WRAP_* options in vend.h to set the scrolling
* Use set_msg(char*) to write a new message to the screen, replacing the
* previous one. The message can be at most 255 characters long. Use
* set_wrap_mode with one of the WRAP_* options in vend.h to set the scrolling