Fix restart command ore count (#1502)

Author: RedRafe

map_gen/maps/danger_ores/modules/restart_command.lua

@@ -136,7 +136,7 @@ return function(config)
         local ore_products = {}
         for _, ore_prototype in pairs(resource_prototypes) do
             local mineable_properties = ore_prototype.mineable_properties
-            if mineable_properties.minable_flag and ore_prototype.resource_category == 'basic-solid' then
+            if mineable_properties.minable and ore_prototype.resource_category == 'basic-solid' then
                 for _, product in pairs(mineable_properties.products) do
                     ore_products[product.name] = true
                 end