Shadi Abdel Salam (1930–1986)   CAIRO ~ Though Martin Scorsese had to cancel his visit to Egypt at the last moment, his presence was strongly felt at the Cairo International Film Festival here on Wednesday night when the classic version of The Mummy was screened. If it hadn't been for Scorsese this Egyptian classic might have just crumbled into obscurity, as has much of this country's history But as the result of financial support from the Martrin Scorsese...