Added a clearscreen() builtin function to the script API. It takes a screen pointer as input, and clears the entire screen to solid black.
The clearscreen() script function is a simple wrapper around the clearscreen() function in gamelib.
Usage: void clearscreen(void* screen)
Note: this has not been tested yet.
Authored by: plombo 2010-12-01
Parent: [r2943]
Child: [r2945]
