Ignore return value when writing to bench log
Ignore return value when writing to bench log

We use one function to write log to both place (server and bench).
Bench file could be closed in some case but we want to use one log
function in bench module.

MrAlone/mzbench,MrAlone/mzbench,machinezone/mzbench,timofey-barmin/mzbench,timofey-barmin/mzbench,MrAlone/mzbench,machinezone/mzbench,timofey-barmin/mzbench,MrAlone/mzbench,timofey-barmin/mzbench,machinezone/mzbench,timofey-barmin/mzbench,MrAlone/mzbench,machinezone/mzbench,machinezone/mzbench