mixer: only save state if not in init
mixer: only save state if not in init

If we are calling emix_config_save_state_get while in init, we are
freeing the list emix_config_save_state_restore is iterating over.
This leads to crashes.

@fix T2942
@fix T2906

rvandegrift/e,rvandegrift/e,rvandegrift/e