qemu: Introduce qemuParseCommandLineVnc
qemu: Introduce qemuParseCommandLineVnc

Refactor qemuParseCommandLine to pull out the "-vnc" argument parsing
into its own helper function.  Modify the code to use "cleanup" instead
of "error" and use the standard return processing to indicate success
or failure by using ret

Signed-off-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

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