ABBA: The Movie (1977; Australia/Sweden; Eastmancolor; 95m) ***½ d. Lasse Hallström; w. Lasse Hallström, Robert Caswell; ph. Jack Churchill, Paul Onorato; m. Benny Andersson, Björn Ulvaeus, Stig Anderson. Cast: Anni-Frid Lyngstad, Benny Andersson, Björn Ulvaeus, Agnetha Fältskog, Robert Hughes, Tom Oliver, Bruce Barry, Stig Anderson. An incompetent radio DJ tries to get an interview with…