TypeError: room.drops[resourceType] is not iterable

[xyzzy529]

Issue summary

Installed fresh 0.5.2.1 and received below error

Description of issue:

The room was stuck not harvesting or upgrading.
https://screeps.com/a/#!/room/shard0/W12S22

I re-copied the 0.5.2.1 release and it gave error.

Steps to reproduce:

AFAIK, just copy/paste the 0.5.2.1 version into main and commit it in screeps/scripts. Then error appears.
The room was previously built out.

Error message:

[11:21:45 AM][shard0]drops: 0 [ruin (link) #626426ae1fdb0a4b034f6fae]
[11:21:45 AM][shard0]TypeError: room.drops[resourceType] is not iterable
    at Overseer.registerLogisticsRequests (main:23745:44)
    at Overseer.init (main:23952:18)
    at _Overmind.init (main:24061:6199)
    at main (main:24313:14)
    at Object.wrap (main:969:16)
    at Object.loop (main:24322:21)
    at __mainLoop:1:52
    at __mainLoop:2:3
    at Object.exports.evalCode (<runtime>:15845:76)

    registerLogisticsRequests(colony) {
        // Register logistics requests for all dropped resources and tombstones
        for (let room of colony.rooms) {
            // Pick up all nontrivial dropped resources
            for (let resourceType in room.drops) {
                console.log("drops:", resourceType, room.drops[resourceType]);  // <--- Added for Debug
                for (let drop of room.drops[resourceType]) {                                 // <--- throws error
                    if (drop.amount > LogisticsNetwork.settings.droppedEnergyThreshold
                        || drop.resourceType != RESOURCE_ENERGY) {
                        colony.logisticsNetwork.requestOutput(drop);
                    }
                }
            }
        }

Suggested fix (optional):

unknown

Other information:

‣ Version: Overmind v0.5.2
‣ Checksum: 0x2bf8f766f8e
‣ Assimilated: No (clearance code: null) [WIP]
‣ Operating mode: automatic

[xyzzy529]

Here is what seems to work as a fix:

    registerLogisticsRequests(colony) {
        // Register logistics requests for all dropped resources and tombstones
        for (let room of colony.rooms) {
            // Pick up all nontrivial dropped resources
            console.log("drops ALL:", JSON.stringify(room.drops,null,4) );
            for (let dropIdx in room.drops) {                      // <--- Added new level of room.drops
                for (let resourceType in room.drops[dropIdx]) {
                    try {
                        for (let drop of room.drops[dropIdx][resourceType]) {
                            if (drop.amount > LogisticsNetwork.settings.droppedEnergyThreshold
                                || drop.resourceType != RESOURCE_ENERGY) {
                                colony.logisticsNetwork.requestOutput(drop);
                                console.log("process drop: ", JSON.stringify(drop.pos), drop.amount );
                            }
                        }
                    } catch (error) { 
                        console.log("drops-error:", dropIdx, resourceType, error);
                    }
                }
            }
        }
        // Place a logistics request directive for every tombstone with non-empty store that isn't on a container