layout: Fix integer overflow when computing size of replace elements
layout: Fix integer overflow when computing size of replace elements

emilio/servo,thiagopnts/servo,larsbergstrom/servo,szeged/servo,fiji-flo/servo,pyfisch/servo,sadmansk/servo,dati91/servo,KiChjang/servo,szeged/servo,nnethercote/servo,peterjoel/servo,CJ8664/servo,paulrouget/servo,peterjoel/servo,paulrouget/servo,nnethercote/servo,emilio/servo,upsuper/servo,dati91/servo,dsandeephegde/servo,dsandeephegde/servo,paulrouget/servo,pyfisch/servo,larsbergstrom/servo,larsbergstrom/servo,saneyuki/servo,DominoTree/servo,mbrubeck/servo,notriddle/servo,sadmansk/servo,cbrewster/servo,pyfisch/servo,DominoTree/servo,canaltinova/servo,upsuper/servo,dsandeephegde/servo,ConnorGBrewster/servo,upsuper/servo,SimonSapin/servo,pyfisch/servo,jimberlage/servo,fiji-flo/servo,cbrewster/servo,mattnenterprise/servo,notriddle/servo,SimonSapin/servo,thiagopnts/servo,CJ8664/servo,nnethercote/servo,notriddle/servo,mattnenterprise/servo,thiagopnts/servo,splav/servo,avadacatavra/servo,KiChjang/servo,splav/servo,canaltinova/servo,canaltinova/servo,jimberlage/servo,dati91/servo,ConnorGBrewster/servo,mbrubeck/servo,dsandeephegde/servo,canaltinova/servo,emilio/servo,nnethercote/servo,nnethercote/servo,cbrewster/servo,anthgur/servo,eddyb/servo,rnestler/servo,cbrewster/servo,paulrouget/servo,paulrouget/servo,mbrubeck/servo,upsuper/servo,eddyb/servo,splav/servo,notriddle/servo,rnestler/servo,KiChjang/servo,mattnenterprise/servo,DominoTree/servo,szeged/servo,peterjoel/servo,ConnorGBrewster/servo,larsbergstrom/servo,anthgur/servo,pyfisch/servo,cbrewster/servo,emilio/servo,fiji-flo/servo,szeged/servo,SimonSapin/servo,dsandeephegde/servo,upsuper/servo,paulrouget/servo,paulrouget/servo,ConnorGBrewster/servo,nnethercote/servo,thiagopnts/servo,splav/servo,saneyuki/servo,DominoTree/servo,jimberlage/servo,saneyuki/servo,mattnenterprise/servo,fiji-flo/servo,avadacatavra/servo,notriddle/servo,szeged/servo,upsuper/servo,sadmansk/servo,eddyb/servo,notriddle/servo,CJ8664/servo,ConnorGBrewster/servo,rnestler/servo,mbrubeck/servo,cbrewster/servo,nnethercote/servo,nnethercote/servo,larsbergstrom/servo,nnethercote/servo,mattnenterprise/servo,sadmansk/servo,eddyb/servo,peterjoel/servo,larsbergstrom/servo,szeged/servo,mbrubeck/servo,splav/servo,rnestler/servo,emilio/servo,thiagopnts/servo,fiji-flo/servo,dati91/servo,canaltinova/servo,avadacatavra/servo,jimberlage/servo,pyfisch/servo,peterjoel/servo,SimonSapin/servo,mbrubeck/servo,emilio/servo,sadmansk/servo,mattnenterprise/servo,emilio/servo,CJ8664/servo,sadmansk/servo,DominoTree/servo,SimonSapin/servo,saneyuki/servo,cbrewster/servo,larsbergstrom/servo,jimberlage/servo,mattnenterprise/servo,eddyb/servo,dati91/servo,anthgur/servo,rnestler/servo,anthgur/servo,ConnorGBrewster/servo,DominoTree/servo,paulrouget/servo,KiChjang/servo,pyfisch/servo,jimberlage/servo,DominoTree/servo,saneyuki/servo,szeged/servo,sadmansk/servo,peterjoel/servo,rnestler/servo,CJ8664/servo,larsbergstrom/servo,DominoTree/servo,splav/servo,dati91/servo,CJ8664/servo,CJ8664/servo,avadacatavra/servo,mbrubeck/servo,emilio/servo,larsbergstrom/servo,eddyb/servo,pyfisch/servo,canaltinova/servo,avadacatavra/servo,szeged/servo,emilio/servo,anthgur/servo,dati91/servo,CJ8664/servo,dati91/servo,peterjoel/servo,fiji-flo/servo,eddyb/servo,KiChjang/servo,peterjoel/servo,anthgur/servo,nnethercote/servo,thiagopnts/servo,anthgur/servo,splav/servo,larsbergstrom/servo,SimonSapin/servo,pyfisch/servo,KiChjang/servo,fiji-flo/servo,thiagopnts/servo,paulrouget/servo,saneyuki/servo,splav/servo,KiChjang/servo,fiji-flo/servo,anthgur/servo,splav/servo,ConnorGBrewster/servo,KiChjang/servo,notriddle/servo,sadmansk/servo,cbrewster/servo,avadacatavra/servo,dsandeephegde/servo,rnestler/servo,avadacatavra/servo,saneyuki/servo,SimonSapin/servo,rnestler/servo,notriddle/servo,notriddle/servo,avadacatavra/servo,szeged/servo,peterjoel/servo,KiChjang/servo,szeged/servo,jimberlage/servo,splav/servo,DominoTree/servo,canaltinova/servo,peterjoel/servo,upsuper/servo,mattnenterprise/servo,canaltinova/servo,SimonSapin/servo,jimberlage/servo,paulrouget/servo,KiChjang/servo,pyfisch/servo,dsandeephegde/servo,saneyuki/servo,DominoTree/servo,notriddle/servo,eddyb/servo,mbrubeck/servo,thiagopnts/servo,saneyuki/servo,ConnorGBrewster/servo,dsandeephegde/servo,emilio/servo,saneyuki/servo,upsuper/servo,jimberlage/servo