fix print_packet so that it doesn't break everything
fix print_packet so that it doesn't break everything

bluerover/6lbr,MohamedSeliem/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,bluerover/6lbr,MohamedSeliem/contiki,bluerover/6lbr,malvira/libmc1322x,arurke/contiki,muffinator/libmc1322x,bluerover/6lbr,bluerover/6lbr,bluerover/6lbr,arurke/contiki,muffinator/libmc1322x,malvira/libmc1322x,bluerover/6lbr,arurke/contiki,arurke/contiki,MohamedSeliem/contiki,arurke/contiki,arurke/contiki,arurke/contiki