GHSA-2XPG-3HX4-FM9R Out of bounds read in xcb

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because there is an out-of-bounds read in xcb::xproto::changeproperty, as demonstrated by a format=32 T=u8 situation where out-of-bounds bytes are sent to an X server...