Use unsigned integers where it makes sense.

(or not)

models/poll_result.go

@@ -14,7 +14,7 @@ type PollCandidateResult struct {
 	Poll        *Poll
 	CandidateID int64 // Issue Index (or internal candidate index, later on)
 	Position    int64 // Two Candidates may share the same Position (perfect equality)
-	MedianGrade int8
+	MedianGrade uint8
 	Tally       *PollCandidateTally
 	CreatedUnix timeutil.TimeStamp
 }

routers/repo/poll_judgment.go

@@ -24,7 +24,7 @@ type CreateJudgmentResponse struct {
 func EmitJudgment(ctx *context.Context) {
 	judge := ctx.User
 
-	grade := int8(ctx.QueryInt("grade")) // 0 if not defined
+	grade := uint8(ctx.QueryInt("grade")) // 0 if not defined
 	if grade < 1 {
 		grade = 0
 	}