tiffdec,MyRead: quiet -Wshorten-64-to-32 warning
tiffdec,MyRead: quiet -Wshorten-64-to-32 warning

Change-Id: I7e2c7a9b80278b3056151c74a939b0f55bbbc90c

PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,webmproject/libwebp,webmproject/libwebp,PKRoma/libwebp