NAME
    AllocRaster -- Allocate space for a bitplane.

SYNOPSIS
    planeptr = AllocRaster( width, height )
       d0                    d0:16  d1:16

    PLANEPTR AllocRaster(UWORD,UWORD);

FUNCTION
    This function calls the memory allocation routines
    to allocate memory space for a bitplane width bits
    wide and height bits high.

INPUTS
    width   - number of bits wide for bitplane
    height  - number of rows in bitplane

RESULT
    planeptr - pointer to first word in bitplane, or NULL if
               it was not possible to allocate the desired
               amount of memory.
BUGS

SEE ALSO
    freeraster() graphics/gfx.h