Now can be crashed with other company's train.

(cherry picked from commit 66ce7057df27aeb276270fe4bdc31f68dc69add3)

src/train_cmd.cpp

@@ -3007,9 +3007,6 @@ static Vehicle *FindTrainCollideEnum(Vehicle *v, void *data)
 	/* not a train or in depot */
 	if (v->type != VEH_TRAIN || Train::From(v)->track == TRACK_BIT_DEPOT) return NULL;
 
-	/* do not crash into trains of another company. */
-	if (v->owner != tcc->v->owner) return NULL;
-
 	/* get first vehicle now to make most usual checks faster */
 	Train *coll = Train::From(v)->First();