tests: use %u instead of %zu for #defined int constants
tests: use %u instead of %zu for #defined int constants

Unless we explicitly cast to size_t, a #defined constant will never be a
size_t.

Signed-off-by: Josef 'Jeff' Sipek <a620f141433c70aa9e43778305a6c68cbfadfb25@josefsipek.net>

jeffpc/libjeffpc,jeffpc/libjeffpc,jeffpc/libjeffpc,jeffpc/libjeffpc