error in register_for_tracker

[protocol-1903]

mod-list.json

[sparr]

The mod uses player indices as table keys in ghost entity tags. Factorio's Lua table implementation preserves integer keys only when they form a contiguous 1..n range (an "array"). So {[1]=true} gives you 1 as a key but {[2]=true} gives you "2" as a key which gets mishandled by code that expected a number.