[osg-submissions] fix for cloning osgParticleEffect

[morten.hauknes at kongsberg.com]

Hi

When cloning effects osg crashes because the copy constructur tries to run av pure virtual method (setUpEmitterAndProgram). The right thing to do when cloning an effect is to run the inherited version og buildEffect and setUpEmitterAndProgram.

Cheers
Morten Hauknes

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