logger: correct cleanup in case 'logger start' fails
logger: correct cleanup in case 'logger start' fails

PX4/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,Aerotenna/Firmware,krbeverx/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,dagar/Firmware,dagar/Firmware,acfloria/Firmware,darknight-007/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,Aerotenna/Firmware,Aerotenna/Firmware,dagar/Firmware,dagar/Firmware,PX4/Firmware,PX4/Firmware,darknight-007/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,Aerotenna/Firmware,acfloria/Firmware,PX4/Firmware,mcgill-robotics/Firmware,dagar/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,krbeverx/Firmware,darknight-007/Firmware,acfloria/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,dagar/Firmware,darknight-007/Firmware,krbeverx/Firmware,PX4/Firmware,Aerotenna/Firmware,krbeverx/Firmware,krbeverx/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,krbeverx/Firmware,jlecoeur/Firmware,darknight-007/Firmware