v0.0-350-g241da92: PR #261: Add cstddef include to fix nullptr_t reference
issues #260 GitHub PR https://github.com/google/verible/pull/261 Copybara import of the project: - 9ee01e3b5e00229c84196652a4acb640a22defda add cstddef inlcude to fix nullptr reference by Alexander Mann <[email protected]> - 7c0d806b877fc9901747e33b37618772adf1291e change nullptr_t to std::nullptr_t by Alexander Mann <[email protected]> Closes #261 PiperOrigin-RevId: 305597016