[PATCH installer] gui: set fill and expand to zero for separator

[Maximiliano Sandoval <m.sandoval@proxmox.com>]

Without this change the separator would both move and grow in size if
the disk setup dialog is resized vertically.

As per gtk_box_pack_end documentation:

> @expand: %TRUE if the new child is to be given extra space allocated
>   to @box. The extra space will be divided evenly between all children
>   of @box that use this option
> @fill: %TRUE if space given to @child by the @expand option is
>   actually allocated to @child, rather than just padding it.  This
>   parameter has no effect if @expand is set to %FALSE [...]

Reported-by: Erik Fastermann <e.fastermann@proxmox.com>
Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
 proxinstall | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/proxinstall b/proxinstall
index 49b1612..2a6a7c0 100755
--- a/proxinstall
+++ b/proxinstall
@@ -1646,7 +1646,7 @@ sub create_hdoption_view {
 
     my $sep2 = Gtk3::Separator->new('horizontal');
     $sep2->set_visible(1);
-    $contarea->pack_end($sep2, 1, 1, 10);
+    $contarea->pack_end($sep2, 0, 0, 10);
 
     $dialog->show();
 
-- 
2.47.3