DVB-CI: don't call proto_tree_add_subtree_format() with tvb==NULL

When I first implemented this, proto_tree_add_subtree_format() worked
for tvb==NULL if len was also 0. The bounds check added in
56706427f53cc64793870bf072c2c06248ae88f3 breaks this use case and makes
DVB-CI spill out dissector asserts.

Warn Dissector bug, protocol DVB-CI, in packet 625:
../epan/tvbuff.c:532: failed assertion "tvb && tvb->initialized"

Create a proto_item first and link the subtree to this item. This will
work as long as proto_tree_add_uint() accepts tvb==NULL.

Thanks to Kay Katzorke for reporting this bug.

Change-Id: I25a071c21925f7d362c92852fd5a8136e4d361c8
Reviewed-on: https://code.wireshark.org/review/19389
Petri-Dish: Martin Kaiser <wireshark@kaiser.cx>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Martin Kaiser <wireshark@kaiser.cx>

0 files changed, 0 insertions, 0 deletions