fix incorrect truncation in Img function, (Thanks Nigel Tao)
fix incorrect truncation in Img function, (Thanks Nigel Tao)

chappyhome/openvg,superjudge/openvg,chappyhome/openvg,mayqueenRD/OpenVG_Rasbian_UI,chappyhome/openvg,superjudge/openvg,mayqueenRD/OpenVG_Rasbian_UI,mayqueenRD/OpenVG_Rasbian_UI,superjudge/openvg,chappyhome/openvg,superjudge/openvg