R1:603cf474ee1d

Fix int fields for now

Summary: Fix T15516

Test Plan: Viewed an "int" custom field, no boom.

Reviewers: speck, valerio.bozzolan, O1 Blessed Committers

Reviewed By: valerio.bozzolan, O1 Blessed Committers

Subscribers: tobiaswiese, Matthew, Cigaryno

Maniphest Tasks: T15516

Differential Revision: https://we.phorge.it/D25325