[PATCH] iconvdata: Fix invalid pointer arithmetic in ANSI_X3.110 module

[Paul Zimmermann]

       Hi Florian,

> > just curious: as long as we don't access the array though array[inptr+1],
> > it is not a problem to just compute inptr+1, no?
> 
> >> -	if (inptr + 1 >= inend)						      \
> >> +	if (inend - inptr <= 1)						      \
> 
> It's still invalid C.
> 
> Technically, inptr could be the last byte in the address space, that is,
> inptr == (const uint8_t *) -1, and then the original comparison would
> give the wrong result.

I understand. Then it is more an overflow issue than "invalid pointer
arithmetic".

Paul