do not toString() when undefined
do not toString() when undefined

avoids a CRIT error

bsmr-x-script/Haraka,hatsebutz/Haraka,typingArtist/Haraka,bsmr-x-script/Haraka,Synchro/Haraka,bsmr-x-script/Haraka,typingArtist/Haraka,typingArtist/Haraka,hatsebutz/Haraka,haraka/Haraka,haraka/Haraka,Synchro/Haraka,smfreegard/Haraka,smfreegard/Haraka,hatsebutz/Haraka,Synchro/Haraka,smfreegard/Haraka,haraka/Haraka,msimerson/Haraka,smfreegard/Haraka,msimerson/Haraka,typingArtist/Haraka,Synchro/Haraka,haraka/Haraka,msimerson/Haraka,msimerson/Haraka,hatsebutz/Haraka,bsmr-x-script/Haraka