add FATPLUS conditional DSIZEX equ

Author: boeckmann

drbio/fdos.equ

@@ -204,7 +204,9 @@ DATTS           equ     byte ptr 11
 ;					; 0x04 - DELETE password
 ;					; 0x02 - WRITE password
 ;					; 0x01 - READ password
+ifdef DOSPLUS
 DSIZEX		equ	12		;file size extension for FAT+ (bit 0-2 and 5-7)
+endif
 DUNDEL		equ	13		;1st letter of deleted file
 DPWD		equ	word ptr 14	;16-bit password hash code
 DMODTIME    	equ	word ptr 16	;delwatch time (hhhhhmmmmmmsssss)