[OpenJDK 2D-Dev] Fix integer overflow warnings in icu layout code

[Omair Majid]

* Omair Majid <omajid at redhat.com> [2016-01-27 15:35]:
> Hi,
> 
> * Phil Race <philip.race at oracle.com> [2016-01-21 17:55]:
> > On 01/21/2016 01:50 PM, Omair Majid wrote:
> > >That said, do you think some sort of add-and-check-for-overflow test
> > >would be suitable here? I can take a shot at implementing it, if you
> > >like.
> > 
> > Sure ! (to the code change option).
> 
> The following webrev implements that:
> http://cr.openjdk.java.net/~omajid/webrevs/le-signed-overflow-warnings/00/
> 
> It uses comparisons with INT32_MAX and INT32_MIN instead of performing
> an addition or subtraction on the variable itself to avoid an overflow.
> With this, I no longer get any overflow warnings.
> 
> On the other hand, if you think these checks are redundant, then I would
> be happy to remove these too.

Ping. Anyone have any comments?

Thanks,
Omair

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