resolve comment

consensus/parlia/parlia.go

@@ -800,8 +800,9 @@ func (p *Parlia) Delay(chain consensus.ChainReader, header *types.Header) *time.
 	}
 	delay := p.delayForRamanujanFork(snap, header)
 	// The blocking time should be no more than half of period
-	if delay > time.Duration(p.config.Period)*time.Second/2 {
-		delay = time.Duration(p.config.Period) * time.Second / 2
+	half := time.Duration(p.config.Period) * time.Second / 2
+	if delay > half {
+		delay = half
 	}
 	return &delay
 }