Starbucks chief executive Howard Schultz on Wednesday defended the company’s decision to support marriage equality, and told investors that if they weren’t on board, they could sell their stock and go elsewhere. Howard Schultz Last year, the Seattle-based company announced its support for legalizing same-sex marriage in Washington state, prompting opponents of the measure — notably the anti-gay National Organization for Marriage — to launch a boycott of Starbucks. At the company’s annual meeting Wednesday, shareholder Tom Strobhar described Starbucks’ first-quarter performance as disappointing, and suggested that was due in part to the boycott. “In the first fill quarter after...