Replace 'goto' error handling with KJ_DEFER.
Replace 'goto' error handling with KJ_DEFER.

nagyistoce/capnproto,khklau/capnproto,ocdtrekkie/capnproto,bsn069/capnproto,rcrowder/capnproto,Fraser999/capnproto,vladon/capnproto,martindale/capnproto,rcrowder/capnproto,ocdtrekkie/capnproto,maurer/capnproto,johnkdoe/capnproto,ocdtrekkie/capnproto,kamalmarhubi/capnproto,nagyistoce/capnproto,a-richardson/capnproto,hntrmrrs/capnproto,vladon/capnproto,khklau/capnproto,khklau/capnproto,a-richardson/capnproto,ligzy/capnproto,Fraser999/capnproto,joliss/capnproto,kamalmarhubi/capnproto,maurer/capnproto,bryce-gibson/capnproto,zarvox/capnproto,mrdomino/capnproto,modulexcite/capnproto,MarPiRK/capnproto,MarPiRK/capnproto,zarvox/capnproto,joliss/capnproto,jparyani/capnproto,mologie/capnproto,bsn069/capnproto,mrdomino/capnproto,geofft/capnproto,modulexcite/capnproto,mologie/capnproto,geofft/capnproto,martindale/capnproto,ligzy/capnproto,pjulien/capnproto,kamalmarhubi/capnproto,bryce-gibson/capnproto,martindale/capnproto,bsn069/capnproto,jparyani/capnproto,johnkdoe/capnproto,mologie/capnproto,zarvox/capnproto,vladon/capnproto,pjulien/capnproto,maurer/capnproto,bryce-gibson/capnproto,joliss/capnproto,johnkdoe/capnproto,geofft/capnproto,rcrowder/capnproto,hntrmrrs/capnproto,nagyistoce/capnproto,a-richardson/capnproto,hntrmrrs/capnproto,Fraser999/capnproto,ligzy/capnproto,modulexcite/capnproto,pjulien/capnproto,mrdomino/capnproto,jparyani/capnproto,MarPiRK/capnproto