Melissa Gilbert’s four-year battle against the National Enquirer is over. The former “Little House on the Prairie” actress and the tabloid have reached an agreement that means she will drop her libel suit over a story in which her ex-husband, Bo Brinkman, called her a “deadbeat mother.” Terms were not disclosed. “It’s like a no-fault divorce,” said the Enquirer’s editor in chief, Steve Coz. “We’re no longer making accusations against each other.” Gilbert filed the suit in 1995, but it was dismissed a year later by a judge who said the Enquirer had quoted Brinkman accurately and could not be sued for neutral reporting on a subject of public interest. Gilbert appealed and the 2nd District Court of Appeals reversed the decision, saying the level of public interest didn’t mean that the actress could not seek damages.