bugfix #7
Description
Sorry I can't tell you how to reliably replicate it, because I had an intermittent issue, & only sometimes when I did something wrong in my level designer, but adding a check at the end of fetch_path fixed it:
the final return in fetch path I altered to check that the from_id was found at all:
return pathfinder_cache[from_id] and pathfinder_cache[from_id][to_id]
[thanks for defgraph, btw, I love it!]