A day after the long-running show “Frank Marino’s Divas Las Vegas” closed on the Las Vegas Strip, an investigation into the show’s charitable activity was reported. Marino for years has said that proceeds from merchandise such as T-shirts and DVDs of the show would be donated to the Make-A-Wish Foundation. The first public report of an investigation into “Divas” over possible fraud was posted by the blog Vital Vegas. In a voicemail message Sunday, Marino said, “I don’t know what anybody’s talking about, at all,” and reiterated his plans to eventually bring “Divas” back to the stage. “Divas” closed abruptly Saturday after a 33-year run on the Strip that started with 25 years at the Riviera.