Producer-director Steven Spielberg called to say that Daily Variety’s figuring of the profits he would realize from the home video sales of his 1982 blockbuster “E. T.: The Extra-Terrestrial"--figures noted in Friday’s Morning Report--were in error, “way on the high side.” Added Spielberg: “Would that (the report that he would realize $75 million from the film’s video release) were true . . . it would be the nicest holiday present a fellow could ask for.” But Variety is standing by its sources, an editor at the trade paper said Tuesday.