WRITER Moustapha Gueye voted for Senegalese President Macky Sall in the last two elections. But disappointment in Sall's second term and the president's thwarted attempt to postpone the next vote have shaken Gueye's allegiance to the ruling Benno Bokk Yakaar (BBY) coalition. Reclining on a sofa at his home in Dakar, Gueye said he was saddened that Sall's presidency had culminated in a bitter electoral tussle with the opposition and in unrest that has dented Senegal's reputation as one of West Africa's more stable nations. "These are domestic issues that Senegal should have grown out of," he said. Sall's shock decision to issue a decree delaying…