parser: do not touch linkless object's links, line split

As it turns out, this did cause problems. After all, the mythical object 0 is the cause of all evil in this world, the reason why no aliens will come from far away galaxies, the reason no timetravellers dare to go to our period, the reason espers choose to hide themselves. Therefore, object 0 is burdened for its sins agains the world by being called trash. Any linkless objects were really linked to object 0. However, being linked to that object with a distance != 0 caused problems. Now it works fine, because we don't even touch linkless object's link array. Which should be 0.