R1:5fabda2a6db1

Check for null, strictly, in maniphest.update param validation

Summary:
If the first non-null entry in the params array is falsey, the request bombs.

Something like {"id":279,"projectPHIDs":[],"status":"0","ownerPHID":"PHID-USER-on3xxsnaljmfn36d4b7a"}

Test Plan:
Before:

echo '{"id":279,"projectPHIDs":[],"status":"0","ownerPHID":"PHID-USER-cj3cpuh7oorbmnn2pl5g"}' | arc call-conduit maniphest.update
{"error":"ERR-NO-EFFECT","errorMessage":"ERR-NO-EFFECT: Update has no effect.","response":null}

After…