<BODY><P>Rani-Saif's special bonding over Kareena in Bangkok </P> <P>Ever since they did <EM>Hum Tum</EM> and <EM>Tara Rum Pum</EM> together, Rani and Saif have shared a very special platonic friendship. "Rani is one co-star I can open my heart to. She