add errlog
add errlog

shenli/mixer,flashbuckets/mixer,fengshao0907/mixer,maxencoder/mixer,leohdr/mixer,shenli/mixer,deafgoat/mixer,leohdr/mixer,siddontang/mixer,maxencoder/mixer,siddontang/mixer,flashbuckets/mixer,deafgoat/mixer,fengshao0907/mixer