Mapgen hickup

[thomasrudin]

reported by zbx

• 5360 5290 -900
• https://pandorabox.io/map/#!/map/1/11/5347/-931

Possible explanation:

• hard crash during mapgen (#267)
• some mapblocks couldn't make it into the db
• regeneration of ores with new mapgen (stone)

[thomasrudin]

closing until it comes up again, looks like a very rare problem...