Snippets for wxwidgets 3.3.4 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/v0fvvyrk54q72vgy34b25p2qzlyz9a6a-wxwidgets-3.3.4.drv.

• ./src/richtext/richtextbuffer.cpp:13407:16: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]