INT 62 u - FGDRIVER v4.02 - "FG_FLICMODE" - GET OPTIMAL VIDEO MODE FOR FLI/FLC
	AX = 002Fh
	ES:BX -> 128-byte buffer containing FLI/FLC file header (see AX=002Eh)
Return: AX = optimal 256-color graphics mode number
	    FFFFh if invalid file header
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Eh,AX=0030h