Draws an aligned or unaligned sprite to the graph buffer with a width that is a multiple of 8 pixels, and any height. Does not perform clipping.
a = X-coordinate of top-left of sprite
b = Sprite height
c = Sprite width (in bytes, so divide by 8)
l = Y-coordinate of top-left of sprite
ix = Pointer to first byte of sprite
Draws the sprite to the graph buffer.