INT 10 - VIDEO - Hercules GRAFIX - "BLKFIL" - BLOCK FILL

	AH = 4Ah
	DI = x coordinate of lower left corner
	BP = y coordinate of lower left corner
	BX = height in pixels
	CX = width in pixels
Return: nothing
Desc:	draw a solid rectangle of the specified size at the given location
SeeAlso: AH=4Eh