Snippets for xterm 411 from Fedora i686

Sourced from https://kojipkgs.fedoraproject.org/packages/xterm/411/1.fc46/data/logs/i686/build.log.

• ./util.c:129:17: warning: unsigned conversion from ‘long long int’ to ‘Pixel’ {aka ‘long unsigned int’} changes value from ‘68719476735’ to ‘4294967295’ [-Woverflow]
    129 | #define NoPixel 0xfffffffff
        |                 ^~~~~~~~~~~