qemu: event: Clean up VNC monitor handling
qemu: event: Clean up VNC monitor handling

Get rid of spice specific stuff from the handler func and save a few
lines by reflowing the conditions.

jardasgit/libvirt,libvirt/libvirt,taget/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,taget/libvirt,zippy2/libvirt,datto/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,rlaager/libvirt,crobinso/libvirt,agx/libvirt,agx/libvirt,rlaager/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,libvirt/libvirt,nertpinx/libvirt,zippy2/libvirt,jfehlig/libvirt,andreabolognani/libvirt,agx/libvirt,andreabolognani/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,datto/libvirt,rlaager/libvirt,olafhering/libvirt,jfehlig/libvirt,datto/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,crobinso/libvirt,taget/libvirt,libvirt/libvirt,taget/libvirt,eskultety/libvirt,nertpinx/libvirt,datto/libvirt,eskultety/libvirt,rlaager/libvirt,taget/libvirt,crobinso/libvirt,eskultety/libvirt,zippy2/libvirt,jardasgit/libvirt,crobinso/libvirt,olafhering/libvirt,jfehlig/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,libvirt/libvirt,VenkatDatta/libvirt,agx/libvirt,zippy2/libvirt,rlaager/libvirt,nertpinx/libvirt,olafhering/libvirt,VenkatDatta/libvirt,agx/libvirt,fabianfreyer/libvirt,eskultety/libvirt,datto/libvirt,fabianfreyer/libvirt