Story By: Ana Lacasa, Sub Editor: Joseph Golder, Agency: CEN Video Credit: CEN/Nay Esparza The four-year-old Harry Potter fan whose brave fight with cancer prompted Daniel Radcliffe to send her a video message of support has died. Gisela 'Gigi' Garcia Fomperosa, from the city of Cuernavaca in south-central Mexico's Morelos state, was diagnosed with acute lymphoblastic leukaemia 19 months…