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

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre