Fix reward.processEvents() to call PRepInfo.ApplyVote() with offset n…

…ot period

icon/iiss/rewards/iiss4/reward.go

@@ -142,7 +142,7 @@ func (r *reward) processEvents() error {
 			if type_ == icstage.TypeEventBond {
 				vType = vtBond
 			}
-			r.pi.ApplyVote(vType, obj.Votes(), r.pi.OffsetLimit()-keyOffset)
+			r.pi.ApplyVote(vType, obj.Votes(), keyOffset)
 			ve.AddEvent(vType, obj.From(), obj.Votes(), keyOffset)
 		}
 	}