Fix compilation issue for x86 architectures.

Description

This change fixes a problem observed with compilation on x86 architectures.

Checklist

Please ensure:

• You are familiar with the contribution guidelines
• All new functionality has sufficient test coverage
• All unit tests are passing
• Any C++ code has been formatted with clang-format
• The changelog is up to date
• Implementation statuses are up to date
• Your contribution meets OpenRNG's license terms