[Proj] Proj 4.9.1RC4 Released

[Howard Butler]

> On Feb 24, 2015, at 11:24 PM, Howard Butler <howard at hobu.co> wrote:
> 
> 
>> On Feb 24, 2015, at 9:00 PM, Greg Troxel <gdt at ir.bbn.com> wrote:
>> 
>> 
>> netbsd-6 i386:
>> 
>> diff tv_out with tv_out.dist
>> 313c313
>> < 13 -10        2073986.9490880956873   -1680858.2722242793534 0.0000000000000
>> ---
>>> 13 -10        2073986.9490880956873   -1680858.2722242795862 0.0000000000000
>> 
>> I am getting the same answer as the debian i386 boxes, I think.
>> 
>> This seems to be two parts in 10^16, and it seems unreasonable to expect
>> that from doubles after actual computation.
> 
> I have updated the test precision, but I'm getting a weird either/or.
> 
> x86_64 is returning 0.00000
> i386 is returning -0.00000
> 
> accordingly, this makes it hard to set the test case.
> 
> Any ideas?
> 
> https://trac.osgeo.org/proj/ticket/255#comment:8

This issue is holding me up from motioning to release 4.9.1. If people do not think this issue warrants holding things up, I will simply remove this test and wait for someone with experience with both the healpix coordinate tests and signed zeros to fix things up.

Howard