Empty containers and border_width

[Federico Mena Quintero <federico novell com>]

Empty containers (well, I just checked GtkBox and GtkTable) will request
a size of (2 * border_width) if the container is empty.

Shouldn't the requisition be just 0 for such empty containers?  Seems
that this may automatically de-chubbify some stale .ui files that end up
with all-empty slots in containers.

  Federico