adding a new contact with empty message crashes

[zoff99]

Describe the bug
add a new contact by scanning the QR code, then press add and leave the message empty.
Antidote crashes and the friend is not added

Your system information:

• Antidote Version: develop
• App from App Store / Testflight / Self compiled / other: Self compiled
• IOS Version: ISO 14.5
• Device: IPhone 6