An emergency regional summit meeting began Saturday in an attempt to end the election deadlock in Zimbabwe, but hopes for a strong statement from the group looked less likely after its most powerful leader, President Thabo Mbeki of South Africa, said the stalemate was not a crisis.Mr. Mbeki also said that ZimbabweÂ’s electoral commission must be given time to release the results of a presidential poll held two weeks ago. He spoke after an hourlong meeting with ZimbabweÂ’s president, Robert Mugabe, who refused to attend the meeting of the regionÂ’s leaders in Zambia.