The newspaper publisher Knight Ridder, which is seeking a buyer under pressure from its largest shareholders, reported a 22 percent decline in fourth-quarter earnings yesterday from a year ago. The company, which is based in San Jose, Calif., earned $83.3 million, or $1.24 a share, in the three months ended Dec. 25, down from $107.2 million, or $1.38 a share, a year earlier. The latest results...