+ Fix seed dupe

Before this patch, the result of the old on_place function (most likely
an itemstack) would not be returned by the new on_place function due to
a missing return statement. This meant that with this mod players could
plant seeds without the seed item's count in their hand becoming lower.

init.lua

@@ -65,9 +65,9 @@ local get_harvest_and_replant_function = function(
 				above = pointed_thing.under,
 				under = pos_under_crop_node,
 			}
-			old_on_place(itemstack, placer, pointed_ground)
+			return old_on_place(itemstack, placer, pointed_ground)
 		else
-			old_on_place(itemstack, placer, pointed_thing)
+			return old_on_place(itemstack, placer, pointed_thing)
 		end
 	end
 end