Fix fulltext node for empty string topics
We had some issues running the fulltext node cause of None types for a message in our bags. With this change this would be fixed.
This closes https://github.com/ternaris/marv-robotics/pull/65
Checklist
-
Collaboration on source branch is allowed -
Commit messages are proper -
CHANGES.rst is updated accordingly -
Code is reviewed
Edited by Florian Friesdorf