While investigating issue #345, it was discovered that `popup()` is getting called during `gr_init()` (and since this is before `gamesnd_parse_soundstbl()` gets called, the eventual call to `gamesnd_play_iface()` results in reading invalid memory). Given that this is basically relying on a feature in the middle of the function initializing it, and given that both lines are preceded by `mprintf()` calls saying basically the same thing, it seems the best solution is to just remove the troublesome lines altogether.