bridge: Hold a reference during cockpit_channel_prepare
bridge: Hold a reference during cockpit_channel_prepare

Closes #1699
Reviewed-by: Stef Walter <8a7fbf0f15d3ad982af54ef28f5c117d2494b76c@redhat.com>

larsu/cockpit,Scribery/cockpit,FireDrunk/cockpit,sgallagher/cockpit,firebitsbr/cockpit,Scribery/cockpit,arilivigni/cockpit,jscotka/cockpit,moraleslazaro/cockpit,FireDrunk/cockpit,harishanand95/cockpit,maxamillion/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,xhad/cockpit,vanloswang/cockpit,cockpit-project/cockpit,kkaempf/cockpit,SotolitoLabs/cockpit,matobet/cockpit,Armstrong1992/cockpit,moraleslazaro/cockpit,zigitax/cockpit,denysvitali/cockpit,firebitsbr/cockpit,matobet/cockpit,denysvitali/cockpit,Armstrong1992/cockpit,SotolitoLabs/cockpit,moolitayer/cockpit,larskarlitski/cockpit,larsu/cockpit,firebitsbr/cockpit,xhad/cockpit,netzvieh/cockpit,andreasn/cockpit,vbatts/cockpit,vanloswang/cockpit,SotolitoLabs/cockpit,firebitsbr/cockpit,michalskrivanek/cockpit,Scribery/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,deryni/cockpit,zigitax/cockpit,martinpitt/cockpit,fridex/cockpit,larskarlitski/cockpit,Armstrong1992/cockpit,Scribery/cockpit,deryni/cockpit,jscotka/cockpit,nmav/cockpit,petervo/cockpit,harishanand95/cockpit,matobet/cockpit,mareklibra/cockpit,deryni/cockpit,andreasn/cockpit,stefwalter/cockpit,zigitax/cockpit,evol262/cockpit,larskarlitski/cockpit,garrett/cockpit,Thermionix/cockpit,stefwalter/cockpit,mvollmer/cockpit,sgallagher/cockpit,petervo/cockpit,darioajr/cockpit,maxamillion/cockpit,vbatts/cockpit,vanloswang/cockpit,nmav/cockpit,mareklibra/cockpit,stefwalter/cockpit,mareklibra/cockpit,larskarlitski/cockpit,sgallagher/cockpit,moolitayer/cockpit,garrett/cockpit,fridex/cockpit,cockpituous/cockpit,arilivigni/cockpit,Thermionix/cockpit,michalskrivanek/cockpit,michalskrivanek/cockpit,evol262/cockpit,sub-mod/cockpit,harishanand95/cockpit,michalskrivanek/cockpit,deryni/cockpit,Armstrong1992/cockpit,michalskrivanek/cockpit,cockpituous/cockpit,larskarlitski/cockpit,haiyangd/cockpit_view,fridex/cockpit,zigitax/cockpit,sgallagher/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,haiyangd/cockpit_view,martinpitt/cockpit,mvollmer/cockpit,jscotka/cockpit,sgallagher/cockpit,vbatts/cockpit,denysvitali/cockpit,darioajr/cockpit,michalskrivanek/cockpit,maxamillion/cockpit,xhad/cockpit,zigitax/cockpit,nmav/cockpit,cockpit-project/cockpit,sub-mod/cockpit,evol262/cockpit,cockpit-project/cockpit,vanloswang/cockpit,arilivigni/cockpit,kkaempf/cockpit,mareklibra/cockpit,jscotka/cockpit,sub-mod/cockpit,nmav/cockpit,vbatts/cockpit,andreasn/cockpit,harishanand95/cockpit,darioajr/cockpit,petervo/cockpit,andreasn/cockpit,petervo/cockpit,kkaempf/cockpit,moolitayer/cockpit,dperpeet/cockpit,evol262/cockpit,vbatts/cockpit,netzvieh/cockpit,garrett/cockpit,arilivigni/cockpit,arilivigni/cockpit,garrett/cockpit,Scribery/cockpit,sgallagher/cockpit,xhad/cockpit,FireDrunk/cockpit,netzvieh/cockpit,cockpit-project/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,stefwalter/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,darioajr/cockpit,fridex/cockpit,maxamillion/cockpit,stefwalter/cockpit,dperpeet/cockpit,fridex/cockpit,vbatts/cockpit,dperpeet/cockpit,mareklibra/cockpit,firebitsbr/cockpit,harishanand95/cockpit,martinpitt/cockpit,netzvieh/cockpit,jscotka/cockpit,dperpeet/cockpit,cockpituous/cockpit,deryni/cockpit,sub-mod/cockpit,maxamillion/cockpit,harishanand95/cockpit,FireDrunk/cockpit,Thermionix/cockpit,larsu/cockpit,moraleslazaro/cockpit,haiyangd/cockpit_view,petervo/cockpit,dperpeet/cockpit,arilivigni/cockpit,xhad/cockpit,larskarlitski/cockpit,moolitayer/cockpit,Armstrong1992/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,cockpituous/cockpit,vanloswang/cockpit,cockpit-project/cockpit,sub-mod/cockpit,deryni/cockpit,mvollmer/cockpit,darioajr/cockpit,matobet/cockpit,larsu/cockpit,andreasn/cockpit,matobet/cockpit,Scribery/cockpit,vanloswang/cockpit,arilivigni/cockpit,haiyangd/cockpit_view,nmav/cockpit,evol262/cockpit,dperpeet/cockpit,Thermionix/cockpit,Scribery/cockpit,netzvieh/cockpit,petervo/cockpit,sgallagher/cockpit,Thermionix/cockpit,cockpituous/cockpit,haiyangd/cockpit_view,denysvitali/cockpit,netzvieh/cockpit,andreasn/cockpit,martinpitt/cockpit,larsu/cockpit,petervo/cockpit,SotolitoLabs/cockpit,kkaempf/cockpit,Thermionix/cockpit,larsu/cockpit,andreasn/cockpit,larskarlitski/cockpit,FireDrunk/cockpit,xhad/cockpit,deryni/cockpit,evol262/cockpit,jscotka/cockpit,vanloswang/cockpit,xhad/cockpit,harishanand95/cockpit,stefwalter/cockpit,fridex/cockpit,moraleslazaro/cockpit,moolitayer/cockpit,garrett/cockpit,denysvitali/cockpit,kkaempf/cockpit,cockpituous/cockpit,dperpeet/cockpit,stefwalter/cockpit,matobet/cockpit