Auto merge of #7594 - metajack:embedding-warnings, r=Ms2ger
Auto merge of #7594 - metajack:embedding-warnings, r=Ms2ger

Fix compiler warnings



<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7594)
<!-- Reviewable:end -->

bjwbell/servo,paulrouget/servo,sadmansk/servo,mbrubeck/servo,rnestler/servo,mattnenterprise/servo,RenaudParis/servo,aidanhs/servo,brendandahl/servo,peterjoel/servo,AnthonyBroadCrawford/servo,RenaudParis/servo,eddyb/servo,sadmansk/servo,upsuper/servo,saneyuki/servo,dati91/servo,eddyb/servo,splav/servo,paulrouget/servo,peterjoel/servo,peterjoel/servo,ConnorGBrewster/servo,canaltinova/servo,pyfisch/servo,canaltinova/servo,CJ8664/servo,bjwbell/servo,mbrubeck/servo,cbrewster/servo,nrc/servo,mbrubeck/servo,cbrewster/servo,jimberlage/servo,mattnenterprise/servo,KiChjang/servo,peterjoel/servo,ConnorGBrewster/servo,larsbergstrom/servo,runarberg/servo,thiagopnts/servo,KiChjang/servo,mattnenterprise/servo,CJ8664/servo,brendandahl/servo,runarberg/servo,saneyuki/servo,mattnenterprise/servo,jdramani/servo,dsandeephegde/servo,rnestler/servo,rnestler/servo,mbrubeck/servo,szeged/servo,rnestler/servo,larsbergstrom/servo,upsuper/servo,emilio/servo,dsandeephegde/servo,larsbergstrom/servo,eddyb/servo,pyfisch/servo,DominoTree/servo,AnthonyBroadCrawford/servo,pyfisch/servo,larsbergstrom/servo,paulrouget/servo,splav/servo,splav/servo,emilio/servo,upsuper/servo,AnthonyBroadCrawford/servo,eddyb/servo,rnestler/servo,splav/servo,KiChjang/servo,aidanhs/servo,DominoTree/servo,anthgur/servo,ConnorGBrewster/servo,caldwell/servo,eddyb/servo,szeged/servo,CJ8664/servo,nnethercote/servo,dagnir/servo,emilio/servo,thiagopnts/servo,eddyb/servo,paulrouget/servo,avadacatavra/servo,KiChjang/servo,caldwell/servo,steveklabnik/servo,GyrosOfWar/servo,runarberg/servo,jdramani/servo,anthgur/servo,nrc/servo,j3parker/servo,j3parker/servo,dagnir/servo,j3parker/servo,larsbergstrom/servo,upsuper/servo,steveklabnik/servo,KiChjang/servo,CJ8664/servo,CJ8664/servo,saneyuki/servo,brendandahl/servo,SimonSapin/servo,cbrewster/servo,GyrosOfWar/servo,aidanhs/servo,emilio/servo,dagnir/servo,j3parker/servo,eddyb/servo,emilio/servo,dsandeephegde/servo,cbrewster/servo,thiagopnts/servo,aidanhs/servo,DominoTree/servo,pyfisch/servo,dati91/servo,szeged/servo,nnethercote/servo,cbrewster/servo,CJ8664/servo,canaltinova/servo,canaltinova/servo,avadacatavra/servo,jdramani/servo,bjwbell/servo,notriddle/servo,bjwbell/servo,jdramani/servo,szeged/servo,jimberlage/servo,dagnir/servo,peterjoel/servo,DominoTree/servo,cbrewster/servo,brendandahl/servo,saneyuki/servo,dsandeephegde/servo,steveklabnik/servo,nrc/servo,DominoTree/servo,cbrewster/servo,nnethercote/servo,paulrouget/servo,splav/servo,WriterOfAlicrow/servo,SimonSapin/servo,larsbergstrom/servo,RenaudParis/servo,upsuper/servo,dagnir/servo,anthgur/servo,canaltinova/servo,caldwell/servo,dagnir/servo,saneyuki/servo,paulrouget/servo,caldwell/servo,AnthonyBroadCrawford/servo,mbrubeck/servo,KiChjang/servo,nnethercote/servo,mbrubeck/servo,notriddle/servo,notriddle/servo,dati91/servo,dati91/servo,emilio/servo,dagnir/servo,fiji-flo/servo,bjwbell/servo,anthgur/servo,rnestler/servo,canaltinova/servo,fiji-flo/servo,avadacatavra/servo,nnethercote/servo,ConnorGBrewster/servo,KiChjang/servo,szeged/servo,SimonSapin/servo,notriddle/servo,GyrosOfWar/servo,CJ8664/servo,pyfisch/servo,DominoTree/servo,RenaudParis/servo,ConnorGBrewster/servo,aidanhs/servo,WriterOfAlicrow/servo,rnestler/servo,saneyuki/servo,thiagopnts/servo,jimberlage/servo,runarberg/servo,GyrosOfWar/servo,emilio/servo,nrc/servo,dsandeephegde/servo,RenaudParis/servo,dsandeephegde/servo,upsuper/servo,larsbergstrom/servo,nnethercote/servo,szeged/servo,SimonSapin/servo,dsandeephegde/servo,peterjoel/servo,fiji-flo/servo,splav/servo,WriterOfAlicrow/servo,avadacatavra/servo,KiChjang/servo,anthgur/servo,canaltinova/servo,anthgur/servo,anthgur/servo,nrc/servo,mattnenterprise/servo,dati91/servo,KiChjang/servo,GyrosOfWar/servo,szeged/servo,splav/servo,thiagopnts/servo,notriddle/servo,pyfisch/servo,jimberlage/servo,avadacatavra/servo,nnethercote/servo,notriddle/servo,sadmansk/servo,avadacatavra/servo,GyrosOfWar/servo,WriterOfAlicrow/servo,bjwbell/servo,fiji-flo/servo,SimonSapin/servo,sadmansk/servo,jimberlage/servo,dsandeephegde/servo,thiagopnts/servo,RenaudParis/servo,steveklabnik/servo,eddyb/servo,caldwell/servo,jimberlage/servo,KiChjang/servo,WriterOfAlicrow/servo,saneyuki/servo,ConnorGBrewster/servo,nnethercote/servo,peterjoel/servo,paulrouget/servo,CJ8664/servo,jdramani/servo,saneyuki/servo,runarberg/servo,emilio/servo,RenaudParis/servo,upsuper/servo,DominoTree/servo,notriddle/servo,brendandahl/servo,sadmansk/servo,dati91/servo,caldwell/servo,thiagopnts/servo,aidanhs/servo,nrc/servo,anthgur/servo,peterjoel/servo,thiagopnts/servo,runarberg/servo,saneyuki/servo,nnethercote/servo,splav/servo,splav/servo,mbrubeck/servo,AnthonyBroadCrawford/servo,aidanhs/servo,DominoTree/servo,fiji-flo/servo,runarberg/servo,mattnenterprise/servo,fiji-flo/servo,notriddle/servo,nrc/servo,paulrouget/servo,fiji-flo/servo,ConnorGBrewster/servo,steveklabnik/servo,szeged/servo,sadmansk/servo,SimonSapin/servo,rnestler/servo,larsbergstrom/servo,SimonSapin/servo,WriterOfAlicrow/servo,saneyuki/servo,ConnorGBrewster/servo,notriddle/servo,GyrosOfWar/servo,peterjoel/servo,sadmansk/servo,pyfisch/servo,avadacatavra/servo,paulrouget/servo,steveklabnik/servo,upsuper/servo,peterjoel/servo,emilio/servo,nnethercote/servo,fiji-flo/servo,mbrubeck/servo,j3parker/servo,AnthonyBroadCrawford/servo,DominoTree/servo,jimberlage/servo,j3parker/servo,steveklabnik/servo,brendandahl/servo,SimonSapin/servo,avadacatavra/servo,notriddle/servo,caldwell/servo,brendandahl/servo,AnthonyBroadCrawford/servo,WriterOfAlicrow/servo,larsbergstrom/servo,pyfisch/servo,szeged/servo,splav/servo,canaltinova/servo,dati91/servo,paulrouget/servo,sadmansk/servo,bjwbell/servo,j3parker/servo,mattnenterprise/servo,jimberlage/servo,emilio/servo,pyfisch/servo,jdramani/servo,szeged/servo,dati91/servo,jdramani/servo,larsbergstrom/servo,jimberlage/servo,DominoTree/servo,pyfisch/servo,cbrewster/servo,mattnenterprise/servo