[gl2ps] Color in new postscript viewports

[Christophe Geuzaine]

Pantxo - Thanks for the patch; I've merged it into SVN.

> On 10 Jun 2016, at 17:05, Pantxo Diribarne <pantxo.diribarne at gmail.com> wrote:
> 
> Hi,
> 
> We identified a bug in gl2ps, from a bug in Octave [1], which is solved by the attached path.
> Basically gl2ps changes the current color in poscript terminal if the color of the current object is different from the previous one. The problem is that after initialization of a new viewport, the current color is white, regardless of the last object color.
> 
> Thanks,
> 
> Pantxo
> 
> [1] http://savannah.gnu.org/bugs/?48148
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
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