qlog: Crashes on collapsing a node with 'NoneType' object is not iterable

[Craig Hewetson]

Open qlog in qbzr branch.

Expand revision 1036.
Select any node within expanded revision node. (eg: 931.1.48)
Then collapse revision 1036.

Result:
bzr: ERROR: exceptions.TypeError: 'NoneType' object is not iterable

Traceback (most recent call last):
  File "/home/craig/.bazaar/plugins/qbzr/lib/util.py", line 1018, in decorate
    run_in_loading_queue(f, *args, **kargs)
  File "/home/craig/.bazaar/plugins/qbzr/lib/util.py", line 1030, in run_in_loading_queue
    f(*args, **kargs)
  File "/home/craig/.bazaar/plugins/qbzr/lib/uifactory.py", line 32, in decorate
    r = f(*args, **kargs)
  File "/home/craig/.bazaar/plugins/qbzr/lib/log.py", line 516, in load_delta
    repos = [gp.get_revid_branch(revid).repository for revid in revids]
TypeError: 'NoneType' object is not iterable

[Craig Hewetson (craighewetson-deactivatedaccount)]

I still get the error.
Looking at the code on line 519 it seems that
revids might contain a element of NoneType.

[Gary van der Merwe (garyvdm)]

My fix was bad. Luks has fixed it now.