Missing Header in posix_rand_getrandom.c

[shikokuchuo]

Describe the bug

The only included header in that file is <sys/random.h>, which is not self-sufficient. Requires a prior size_t definition from

Expected behavior No error.

Actual Behavior Causes build failure when cross-compiling to WASM using Emscripten.

To Reproduce See for example: https://github.com/r-universe/shikokuchuo/actions/runs/8638527703/job/23683225713#step:5:471

Environment Details

• NNG version: 1.7.3
• Operating system and version: Ubuntu 22.04
• Compiler and language used: Clang 18
• Shared or static library: Static