PERHAPS it’s because Eumir Felix Marcial was about to board a plane for home that he decided to defend his middleweight gold medal at the 31st Southeast Asian Games that open next month in Hanoi. “That’s my commitment to the Filipino people—and the road to the Paris Olympics begins in Hanoi,” Marcia, 26, told BusinessMirror on Wednesday as he was about to board a Philippine Airlines flight back to Manila with wife Princess. “I finally made a decision that I really need to compete there.” Marcial was undecided to compete in Hanoi just the day before although his name is on the list submitted fo…