Sharon Stone was “laughed” at by studio executives when she pitched a ‘Barbie’ movie in the 1990s. The ‘Basic Instinct’ actress recalled how film chiefs poured scorn on her idea for a film about the iconic toy doll and is grateful for the changes that have happened in Hollywood that led to Margot Robbie’s hugely successful blockbuster last year. Commenting on an Instagram post showing ‘Barbie’ star America Ferrera’s speech at the Critics Choice Awards last weekend, Sharon wrote: “I was laughed out (of) the studio when I came (with) the ‘Barbie’ idea in the ’90s (with) the support of the head o…