The previous situation is unfortunately not sustainable; header pollution
isn't consistent across all non-Windows platforms. As a result, some of
the earlier includes may pull functions/types into the global namespace too
soon, and the later includes will have no visibility of them because they're
in a different namespace. Re-including the necessary one doesn't work
because include guards will prevent their re-inclusion, and it's not a good
idea to try and #undefine include guards now that we're in a new namespace.
This fixes the build on FreeBSD, and likely some other systems as well.
- If an actor crosses back over a portal because they're blocked, it will result in false positives.
- Fixed nodes not being targeted for aim direction.
- AMBUSH flag on nodes makes them blind and untargetable when getting `startnode` and `goalnode` for `FindPath()`. This is useful for indicating a node should be skipped when tele/portaling, so the current path can be preserved.
- Setup is simple: place nodes behind lines that tele/portal entities and mark them as AMBUSH.
Other changes:
- Restored global array since blockmap is not a viable option here.
- Added MAPINFO `pathing` flag which enables pathing by default.
- Added NOPATHING flag to disable pathing entirely, useful for maps that have pathing enabled.
- Added `ReachedNode(Actor mo)` virtual, responsible for handling node traversal.
- Nodes now make use of MeleeRange to limit their sight checking functions.
Extra safety to ensure dummy Actor deaths properly emulate a real death and aren't duplicate called. Fixed a crash when using the kill command while set to unmorph on death. Super morphing is now possible while using the morphme cheat if passing the morph class directly. Added a flag to ignore player invulnerability completely when morphing.
Added getter and setter functions for handling whether or not the player fields should be gotten/set. Added MRF_KEEPARMOR flag to prevent stripping armor on morph. Optimized unmorphed Actor by setting it to NoInteraction and removing it from the blockmap and sector lists.
