(Reuters) – A judge in Atlanta on Friday denied the ex-wife of R&B singer Usher temporary primary custody of their two children after one of them was hospitalized following a swimming pool accident at Usher's house. Fulton County Superior Court Judge John J. Goger dismissed the motion for primary custody filed on Tuesday by Tameka Foster, saying that there was no reason for the singer to relinquish primary custody because of one accident. Usher, 34, has custody of 5-year-old Usher Raymond V and his younger brother Naviyd, 4. …