grfcodec: 6.0.3-1~getdeb1

  * New upstream version
    - NFORenum specific changes:
      - Data file updates
        - Action 4 language ID 0x13 (Scottish Gaelic).
        - Action D patch variables 15 and 16.
        - Action 5, type 15 (OpenTTD GUI): Now 174 sprites are allowed
    - GRFcodec specific changes:
      - Fix container v2 include sprite decoding.
      - Fix encoding from interlaced png images.
    - GRFID specific changes:
      - Fix number of crashes caused by corrupted NewGRFs