Fix 32-bit build.
Fix 32-bit build.

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