Second part of the LBA fix

ChangeLog.lbafix

@@ -2,4 +2,5 @@
 
 	* kern/i386/pc/startup.S (grub_biosdisk_get_diskinfo_int13_extensions):
 	Ignore return status if CF is cleared.
+	(grub_biosdisk_get_diskinfo_standard): Likewise.
 

kern/i386/pc/startup.S

@@ -824,6 +824,11 @@ FUNCTION(grub_biosdisk_get_diskinfo_standard)
 	.code16
 	movb	$0x8, %ah
 	int	$0x13		/* do the operation */
+	jc      noclean2
+	/* Clean return value if carry isn't set to workaround
+	some buggy BIOSes.  */
+	xor     %ax, %ax
+noclean2:
 	/* check if successful */
 	testb	%ah, %ah
 	jnz	1f