Main: ParticleSystem - fix autoupdate of AABB
Main: ParticleSystem - fix autoupdate of AABB

previously it was strictly growing

OGRECave/ogre,paroj/ogre,OGRECave/ogre,paroj/ogre,OGRECave/ogre,paroj/ogre,OGRECave/ogre,paroj/ogre,paroj/ogre,OGRECave/ogre