PHOTO FINISH: When it comes to art, it’s not always love at first sight. At the opening Wednesday night for a David Seidner exhibition at the Pierre Berge -Yves Saint Laurent foundation, art dealer owner Yvon Lambert recalled the time Seidner, who died in 1999, took a photo of him. “I hated it, so I threw it out” said Lambert, who is about to open his third gallery in London. “He was a great friend,” said Berge. Loulou de la Falaise marveled at the photographs, while making a political statement with an Obama badge clipped to her bag. “I have several, and he also took photos of me,” said Jean Paul Gaultier. The designer said just finished the wardrobe for the tour of French Canadian singer Mylene Farmer, as well as designing the costumes for the Angelin Preljocaj ballet production of “Snow White,” currently on in Lyon.