networkStartNetworkVirtual: s/err5/error
networkStartNetworkVirtual: s/err5/error

In attempt to getting rid of errN labels let's start with the
most upper one and rename it to 'error'.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

libvirt/libvirt,nertpinx/libvirt,andreabolognani/libvirt,zippy2/libvirt,zippy2/libvirt,olafhering/libvirt,jardasgit/libvirt,olafhering/libvirt,zippy2/libvirt,nertpinx/libvirt,nertpinx/libvirt,eskultety/libvirt,eskultety/libvirt,jardasgit/libvirt,nertpinx/libvirt,zippy2/libvirt,nertpinx/libvirt,andreabolognani/libvirt,olafhering/libvirt,fabianfreyer/libvirt,olafhering/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jfehlig/libvirt,andreabolognani/libvirt,eskultety/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,crobinso/libvirt,eskultety/libvirt,libvirt/libvirt,crobinso/libvirt,libvirt/libvirt,libvirt/libvirt,jfehlig/libvirt,jfehlig/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jardasgit/libvirt,crobinso/libvirt,andreabolognani/libvirt