Added patch for eigen bug 1086, to support new SuiteSparse

[parejkoj]

Apply a tweaked version of the the patch in eigen ticket 1086:

http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1086

to solve the UF_fact that long doesn't exist in newer versions of SuiteSparse.

[timj]

I looked at the ticket branch in my git checkout and there were five commits. Checking it out again moves it to one. I think I would have preferred two commits (one for the upstream patch and one for the local tweaks) but I'm not overly bothered.

[parejkoj]

Good point about two commits. Sadly, I can't "unsquash".

If you're happy with it, I'll merge.

[RobertLuptonTheGood]

Aren't the old change sets still in the reflog?

    R

On 29 Feb 2016, at 18:28, John Parejko notifications@github.com wrote:

Good point about two commits. Sadly, I can't "unsquash".

If you're happy with it, I'll merge.

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[timj]

Yes: d30c091

[parejkoj]

Oh, I just merged this. Should I go back and sort that out? I expect that what will actually happen in the future is we'll upgrade to eigen 3.3 when it is released, and just delete the patch.

[timj]

Leave it now. No one wants to force push to master...