INT 62 u - FGDRIVER v4.02 - "FG_PCXPAL" - GET PALETTE STORED IN PCX FILE
	AX = 008Ch
	ES:BX -> variable pointer record (see #03494)
Return: AX = number of colors in palette (16 or 256) or
	    FFFEh not a valid PCX file
	    FFFFh file not found
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=008Dh


Format of FGDRIVER PCXPAL variable pointer record:
Offset	Size	Description	(Table 03494)
 00h	WORD	segment of ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. .PCX filename
 02h	WORD	offset of ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. .PCX filename
 04h	WORD	segment of buffer for .PCX palette RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. triples
 06h	WORD	offset of buffer for .PCX palette RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components.  See also YUV. triples
Note:	the buffer for the palette must hold at least three times as many bytes
	  as there are colors in the palette
SeeAlso: #03495