- replaced TStaticArray with regular TArrays.
They had incomplete implementations preventing proper cleanup of the level loading code. It makes more sense to add the missing methods to the regular TArray and use that.
This also makes some changes to how the game nodes are used to avoid creating a copy: If the head node's pointer is stored in a separate variable, no code needs to check which of the two arrays gets used.
This solves the most severe occurences of sprites being drawn in front of a portal's contents. It is not a full fix, though, there's still some extreme cases where portals may glitch if some stuff gets between the camera and the actual portal area.
Normally this has to perform a full check of the subsector against the portal's camera-facing linedefs but that's too costly for those rare cases where it may be an issue.
