fix bug in shrink
fix bug in shrink

bigmeech/AutobahnJS,Dynalon/autobahn-js,Dynalon/autobahn-ts,Dynalon/autobahn-ts,tavendo/AutobahnJS,Dynalon/autobahn-ts,mykwillis/wamp-tessel,oberstet/autobahn-js,r2fresh/AutobahnJS,goeddea/autobahn-js,svvac/AutobahnJS,svvac/AutobahnJS,crossbario/autobahn-js,oberstet/autobahn-js,bigmeech/AutobahnJS,Aomitayo/AutobahnJS,crossbario/autobahn-js,crossbario/autobahn-js,SpirentOrion/AutobahnJS,cantidio/autobahn-js,oberstet/autobahn-js,bigmeech/AutobahnJS,robertkraig/AutobahnJS,Dynalon/autobahn-js,crossbario/autobahn-js,r2fresh/AutobahnJS,goeddea/autobahn-js,tavendo/AutobahnJS,Dynalon/autobahn-js,miracle2k/AutobahnJS,Dynalon/autobahn-js,cantidio/autobahn-js,cantidio/autobahn-js,markope/AutobahnJS,ewollesen/AutobahnJS,Dynalon/autobahn-ts,oberstet/autobahn-js,tavendo/AutobahnJS,svvac/AutobahnJS,SpirentOrion/AutobahnJS,goeddea/autobahn-js