CmdIndustryGSEvent:
p1 = industry id
p2 = custom data vor var 10 resp. 18

CmdIndustryAreaGSEvent:
tile = start tile of area
p1 = end tile of area
p2 = custom data vor var 10 resp. 18

Both commands trigger two callbacks for each targeted industry:
CB 29 (random production change) variable 10: 32 bits from p2
CB 25 (animation trigger for all tiles) variable 18: 32 bits from p2