cpp: fix asan error in process.setuid/setgid

[nektro]

No description provided.

[robobun]

^{Updated 10:53 PM PT - Feb 12th, 2025}

❌ @nektro, your commit 459d1e7 has 4 failures in Build #11551:

• test/js/third_party/duckdb/duckdb-basic-usage.test.ts - 1 failing on 🐧 22.04 x64-baseline
• test/cli/install/bun-install-registry.test.ts - 1 failing on 🪟 2019 x64-baseline
• test/cli/install/bun-install-registry.test.ts - 1 failing on 🪟 2019 x64
• test/cli/install/bun-install-patch.test.ts - internal assertion failure on 🪟 2019 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🪟 2019 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🪟 2019 x64-baseline
• test/cli/create/create-jsx.test.ts - 2 failing on 🍎 14 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 20.04 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 22.04 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 12 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 24.04 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🍎 14 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🍎 13 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 3.20 aarch64
• test/cli/create/create-jsx.test.ts - 2 failing on 🍎 13 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 24.04 x64-baseline
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 12 x64-baseline
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 22.04 x64-baseline
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 20.04 x64-baseline
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 22.04 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 12 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 20.04 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 24.04 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 3.20 x64
• test/cli/create/create-jsx.test.ts - 2 failing on 🐧 3.20 x64-baseline

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🧪   try this PR locally:

bunx bun-pr 17300