‘Fun Size’ short on sense, but treats with some laughs

Victoria Justice has made a rather respectable name for herself on Nickelodeon. From her early days as the resident goth on “Zoey 101,” Justice emerged as the network’s new darling with her successful stint on “Victorious.” It’s easy to see Justice’s appeal: She’s beautiful, affable and actually has a talented singing voice. She’s likable without being…