examples: Initialize @pos in domtop.c
examples: Initialize @pos in domtop.c

This is a zero-cost workaround for a bug in GCC 8.3.0 which causes the
compilation to fail, because the compiler thinks that the value might be used
uninitialized even though it clearly cannot be.

Signed-off-by: Martin Kletzander <e82f23e74d43760279ebcc505dac4ae70d5627d0@redhat.com>

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