Talking stops the game

[scemino]

Describe the bug
When you talk to someone if there is no lip file, the game stops.

To Reproduce
Steps to reproduce the behavior:

1. Use Ransome the first time
2. Click on the hint flyer
3. Ransome should say It says, "Need help playing Thimbleweed Park?"

Expected behavior
The engine is expecting a lip file corresponding to the text, but sometimes there is no lip file associated, in this example it's normal because we don't see Ransome.
The game should ignore and not crash 😉

Desktop (please complete the following information):

• OS: macOS
• Version: BigSur 11.1

[Mac1512]

I have compiled the commit: (17c5081)

In debug mode, it still crashes when Boris speaks, I think there is still a problem in some "Lip" file.

It has thrown me an exception:

In Release mode, I have not tried, but I have tried the version 0.7.1 Beta that you have released and being in release mode, in that part it does not fail. So, just throw the exception in Debug mode.