[PATCH] Fixes sentinel warnings on GCC4

[Chris Shoemaker]

On Mon, Dec 05, 2005 at 10:09:10PM -0500, David Hampton wrote:
> On Mon, 2005-12-05 at 21:25 -0500, Chris Shoemaker wrote:
> 
> > The #define NULL 0 case is explicitly allowed by the ISO C standard,
> > and it's easy to write portable code that works for that case, so why
> > wouldn't we?
> 
> I don't know for sure, but I strongly suspect that our code is already
> limited to compiling with the gnu tool chain.  Given that gcc seems to
> do the right thing where NULL is concerned, I feel no need to do
> anything more than add a note that gcc is required to compile gnucash.
> I've got too many other dragons to slay.

Fair enough.  I'll grab the original patch, remove redundant portions
and apply it.  I'm convinced it's correct.  I figure it's easier to
follow the standard than to figure out what weird systems people
compile GnuCash on.  ( I don't even want to hazard a guess. ) 

-chris