Diffusion - be sure to properly unserialize result from conduit query
Summary: Fixes T7256.
Test Plan: Looked at rXPRF0a7a5f69f5d7 in a local instance. things looked great both pre and post patch.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7256
Differential Revision: https://secure.phabricator.com/D11790