AE OG Bug - Interrupting demo during Abe gamespeak breaks gamespeak & causes special case crashes

[pryon]

Description of issue: If a currently playing demo gets aborted by hitting any key while Abe is talking, the next time the demo runs, gamespeak will stop eliciting responses from mudokons, as well as breaking demo movement. If instead of restarting the demo, the game is played instead, the same can be observed.

In special cases a crash can also be triggered, e.g. by aborting and restarting the Blind Mudokons 2 demo.

Steps to repro:

1. Navigate to Options -> Demos in the main menu
2. Start playing Blind Mudokons 2
3. Abort demo while Abe is saying hello
4. Restart demo, wait a little until Abe says hello again

Interestingly enough this scenario does not crash R.E.L.I.V.E., but causes graphical glitches: