Demo app - crash on simulating incoming audio message

[GianniCarlo]

New issue checklist

• I have read all of the README, documentation, and FAQ.
• I have reviewed the contributing guidelines. Confirmation: 💪😎👊
• I have searched existing issues and this is not a duplicate.

General information

• Library version(s): 7.2.0 (develop branch)
• iOS version(s): All
• Devices/Simulators affected: All
• Reproducible in the demo project? (Yes/No): Yes

Expected behavior

Having an audio message as the last message, when pressing the right navigation bar button, it should show an incoming audio message

Actual behavior

Having an audio message as the last message, when pressing the right navigation bar button, it crashes

Steps to reproduce

Open the demo app, make sure you have a audio message as the last message and press the right navigation bar button

This crash is due to not including an if else statement in receiveMessagePressed for the simulated incoming audio message.

I'll create a pull request for this