The PacketDiagram widget prints debugging information about items that
it skips and resizes. Make this conditional, similar to what we do
elsewhere.
Bug: 16769
Change-Id: Id7fbedbdac6096cbca8d997688d489eac4729f52
Reviewed-on: https://code.wireshark.org/review/38121
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>