Error "fixme unknown flag"

[kant2002]

The map at address (https://github.com/kant2002/scm2txt/blob/master/tests/data/waterworld/map.scm) failed to load using OpenBW. It was created using SCM Draft if this is matters,

[kant2002]

@tscmoo Looks like I narrow down this to small blocks of minerals/gas which act as collectible items. Not sure that this is priority for you, but would be good at least not crash on these items.