Support soundgen calls for activators
To reproduce, the activator in this plugin uses the dremora NIF:
placeatPC "test_dremora" 1 1 1 Then on the dremora: playgroup death2 1
OpenMW gives in console:
Error handling text key soundgen: scream: class does not support soundgen look up Error handling text key soundgen: land: class does not support soundgen look up
Vanilla engine just plays the sounds. I don't think this is used by any vanilla objects though.
(RM-4285 from redmine: created on 2018-01-04 by rot tor, )