Bugfix: InstanceManager::getMaxOrBestNumInstancesPerBatch shouldn't crash when a material wasn't found
Bugfix: InstanceManager::getMaxOrBestNumInstancesPerBatch shouldn't crash when a material wasn't found

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