Inheritance bug

[GuardianDll]

Is your feature request related to a problem? Please describe.

i have a terrain, which has TRANSPARENT flag, but few another terrains, that copy-from the original one has lack of this flag

Solution you would like.

to inherit terrain flags from original node

Describe alternatives you have considered.

write about this inheritance thing on the github wiki

Additional context

the original terrain

{
    "type": "terrain",
    "id": "t_deck_coating_no_roof",
    "name": "deck coating",
    "description": "Thick metal covering of a hull, covered with a military grade epoxy mix.",
    "symbol": ".",
    "looks_like": "t_pavement",
    "color": "dark_gray",
    "connects_to": "METALFLOOR",
    "move_cost": 2,
    "flags": [ "FLAT", "ROAD", "TRANSPARENT" ],
    "bash": {
      "sound": "thump",
      "ter_set": "t_null",
      "str_min": 500,
      "str_max": 1000,
      "str_min_supported": 200,
      "items": [
        { "item": "steel_lump", "count": [ 1, 4 ] },
        { "item": "steel_chunk", "count": [ 3, 12 ] },
        { "item": "scrap", "count": [ 9, 36 ] }
      ]
    }
  },

example of copy-from terrain

{
    "type": "terrain",
    "id": "t_deck_coating_no_roof_r",
    "name": "red deck coating",
    "description": "Thick metal covering of a hull, covered with a military grade epoxy mix, and painted in red color.",
    "copy-from": "t_deck_coating_no_roof",
    "looks_like": " ",
    "move_cost": 2,
    "symbol": ".",
    "color": "red"
  },

expectation

reality

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