tiffdec,ReadTIFF: ensure data_size is < tsize_t max
tiffdec,ReadTIFF: ensure data_size is < tsize_t max

Change-Id: I0ad9589a7f994294100e1c5a38abf6ebe417f8a9

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