fix a few minor bugs

df_caverns/level2.lua

@@ -98,7 +98,7 @@ local spore_tree_cavern_floor = function(abs_cracks, vert_rand, vi, area, data,
 		if math.random() < 0.1 then
 			df_caverns.place_shrub(vi+ystride, area, data, data_param2, spore_tree_shrublist)
 		elseif math.random() < 0.05 then
-			df_trees.spawn_spore_tree_vm(vi+ystride, area, data)
+			df_trees.spawn_spore_tree_vm(vi+ystride, area, data, data_param2)
 		end
 	end
 end

df_caverns/sunless_sea.lua

@@ -131,7 +131,7 @@ local fungispore_cavern_floor = function(abs_cracks, vert_rand, vi, area, data,
 			if math.random() < 0.025 then
 				df_trees.spawn_fungiwood_vm(vi+ystride, area, data)
 			elseif math.random() < 0.025 then
-				df_trees.spawn_spore_tree_vm(vi+ystride, area, data)
+				df_trees.spawn_spore_tree_vm(vi+ystride, area, data, data_param2)
 			end
 		end
 	end

df_caverns/surface_tunnels.lua

@@ -57,11 +57,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, humidity > 30)
 				end
 				previous_potential_floor_vi = nil
-				previous_potential_floor_in_range = nil
 			elseif not mapgen_helper.buildable_to(current_node) then
 				-- we've entered a non-stone ceiling of some kind. Abort potential floor-ceiling pair detection.
 				previous_potential_floor_vi = nil
-				previous_potential_floor_in_range = nil
 			end
 		end
 		previous_node = current_node