Merge pull request 'Fix issue with wrong lighting in caves' (#2657) from fix_cave_lighting into master

Reviewed-on: MineClone2/MineClone2#2657

mods/MAPGEN/mcl_mapgen_core/init.lua

@@ -313,7 +313,7 @@ local function world_structure(vm, data, data2, emin, emax, area, minp, maxp, bl
 		end
 	end
 
-	return lvm_used, false
+	return lvm_used, lvm_used
 end
 
 local function block_fixes(vm, data, data2, emin, emax, area, minp, maxp, blockseed)