Austria at age 83. was eulogized today by his longtime South Bend friend. Msgr. John S. Sabo. as "a wonderful man." A spokesman at the palace of Viennas ArchbishopCardinal Franz Koenic said Mindszenty died in a Vienna hospital at 8:15 a.m. EST. The spokesman said the cardinal underwent prostate surgery this morning and died four hours later from heart failure. A onetime major figure of the EastWest controversy. Cardinal Mindszenty. a bitter enemy of communism. was long a refugee in the United States mission in Budapest. Communists had tortured him and sentenced him to life imprisonment in 1949 for fighting the Red takeover of his country. Msgr.