- testzell::pcg: make lowering precision explicit

test/common/cpp/lib/testzell/pcg.cpp

@@ -14,7 +14,7 @@ auto pcg32_random(state32* rng) -> uint32_t
   rng->state = (rng->state) * 0X5851F42D4C957F2DULL;
   // NOLINTNEXTLINE(hicpp-signed-bitwise)
   rng->state += (rng->stream | 1);
-  const uint32_t xorshifted = ((old >> 18U) ^ old) >> 27U;
+  auto const xorshifted = static_cast<uint32_t>(((old >> 18U) ^ old) >> 27U);
   const uint32_t rot = old >> 59U;
   // NOLINTNEXTLINE(hicpp-signed-bitwise)
   return (xorshifted >> rot) | (xorshifted << ((-rot) & 31));