TEGUCIGALPA, Honduras — Hungry Hondurans scrambled through looted stores and lined up for food on Wednesday during a break in a long curfew called to halt violence that erupted with the return of the country's deposed leftist president. Troops and police ringed the Brazilian Embassy where ousted President Manuel Zelaya took shelter on Monday after returning home in a daring challenge to the interim government that threw him out of the country at gunpoint in June and that vows to arrest him if he leaves the shelter of the diplomatic mission.