[patch] alias.c: Replace "return NULL_RTX" with "return 0".

[Zack Weinberg]

Fergus Henderson <fjh@cs.mu.oz.au> writes:

> On 12-Jun-2003, Kazu Hirata <kazu@cs.umass.edu> wrote:
>> Attached is a patch to replace "return NULL_RTX" with "return 0".
>
> I think it would be better style to replace NULL_RTX with NULL
> rather than with 0.

GCC sources prefer 0 to NULL for a generic null pointer.

zw