fix jsonify filter when used with boolean values
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Fixes #3153.
Rel: #3145.
Since d26202936ebe0d14bcacc5dea9c40a1b4bb830f3.
Merge pull request #3154 from afeld/jsonify-bool
Update history to reflect merge of #3154 [ci skip]
Merge remote-tracking branch 'upstream/master'