Little log information error

[zhanghefan123]

Description

In fabric-3.0.0/orderer/consensus/smartbft/synchronizer_bft.go, the debug log message contains an incorrect annotation. When the number of reported heights is insufficient (len(heights) < f+1), the log states it's returning heights[0] (the highest height), but the code actually returns heights[len(heights)-1] (the lowest available height).

func (s *BFTSynchronizer) computeTargetHeight(heights []uint64) uint64 {
  // ... 
  if lenH < f+1 {
    s.Logger.Debugf("Returning %d", heights[0])
    return heights[int(lenH)-1]
  }
  // ...
}

Steps to reproduce

No response