D29262: Less segfaulty PageRouterAttached

[Carson Black]

cblack created this revision.
cblack added a reviewer: Kirigami.
Herald added a project: Kirigami.
Herald added a subscriber: plasma-devel.
cblack requested review of this revision.

REVISION SUMMARY
  - PageRouterAttached will have its router set when the PageRouter creates an object for a route instead of relying on tree climbing
  - All PageRouterAttached methods now check for null

TEST PLAN
  `make test`

REPOSITORY
  R169 Kirigami

BRANCH
  cblack/less-segfaulty-pagerouter (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D29262

AFFECTED FILES
  src/pagerouter.cpp
  src/pagerouter.h

To: cblack, #kirigami
Cc: plasma-devel, fbampaloukas, GB_2, domson, dkardarakos, ngraham, apol, ahiemstra, davidedmundson, mart
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