FIX: connect road past the far end of bridge when building, avoid building bridges to blocked tiles
Merge branch 'paxgen-fix-building-reader' into paxgen-fix-bridges
* bauer/hausbauer.cc: call check_road_tiles implicitly. Fixes segfault.
* dings/gebaeude.cc: properly deregister roads that have changed height. Fixes segfault.
Merge branch 'paxgen-fix-bridges' of https://github.com/pipcet/simutrans-experimental.git into passenger-generation
CODE: Style changes.