NAME
	FreeScreenBuffer -- Free a ScreenBuffer structure. (V39)

    SYNOPSIS
	FreeScreenBuffer( Screen, ScreenBuffer )
	                  A0      A1

	VOID FreeScreenBuffer( struct Screen *, struct ScreenBuffer * );

    FUNCTION
	Frees a ScreenBuffer structure you got from AllocScreenBuffer(),
	and releases associated resources.  You must call FreeScreenBuffer()
	before you close your screen.

    INPUTS
	Screen: pointer to the screen this ScreenBuffer is associated with.
	ScreenBuffer: pointer to a ScreenBuffer structure obtained from
	    AllocScreenBuffer().  It is safe to call this function with
	    a NULL argument.  It will have no effect.

    RESULT
	None.

    NOTES
	Originally, FreeScreenBuffer() did not WaitBlit() before freeing
	a BitMap.  The intent was that the application should do this.
	However, as this sort of thing is easily forgotten, WaitBlit()
	was added in V40.  Application writers should ensure that freeing
	the buffer is safe by calling WaitBlit() themselves.

	The SB_SCREEN_BITMAP flag instructs AllocScreenBuffer() to provide
	a ScreenBuffer referring to the screen's actual bitmap.  When
	you are done changing screen buffers, you must FreeScreenBuffer()
	the currently-installed ScreenBuffer before you close the screen.
	Intuition will recognize when FreeScreenBuffer() is called for
	the currently-installed ScreenBuffer, and will know to free the
	supporting structures but not the BitMap.  CloseScreen() will
	take care of that.

    BUGS

    SEE ALSO
	AllocScreenBuffer(), ChangeScreenBuffer(),
	graphics.library/ChangeVPBitMap()