Fix C lint errors

[stdlib-bot]

C Linting Failures

Linting failures were detected in the automated lint workflow run.

Workflow Details

• Run: https://github.com/stdlib-js/stdlib/actions/runs/23099301419
• Type: C Linting
• Date: 2026-03-15 00:20:35 UTC

Error Details

lib/node_modules/@stdlib/math/strided/special/smskinv/benchmark/c/benchmark.length.c:131:32: warning: Uninitialized variable: x [uninitvar]
  stdlib_strided_smskinv( len, x, 1, m, 1, y, 1 );
                               ^
--
                               ^
lib/node_modules/@stdlib/math/strided/special/smskinv/benchmark/c/benchmark.length.c:131:38: warning: Uninitialized variable: m [uninitvar]
  stdlib_strided_smskinv( len, x, 1, m, 1, y, 1 );
                                     ^

Pull Request Instructions

• Please use the following PR title format:
  "chore: fix C lint errors (issue #<ISSUE_NUMBER>)".
• Reference this issue in the "Related Issues" section of the PR body as "resolves #<ISSUE_NUMBER>".