[BUGFIX] fixed multiplication promotion to larger type in span size

[irtaza-shahzad]

What problem was solved in this pull request?

Issue Number: Close #572

Problem:
Static analysis (codescan) flagged a potential issue where the result of a multiplication operation (item_size() * num) is implicitly converted to a larger type. This may lead to unexpected behavior or data loss on certain compilers or platforms due to integer overflow.

What is changed and how it works?

Changes:

• Explicitly cast the multiplication result to the correct target type before passing it to span<const char>().
• Ensures type safety and avoids potential overflow or truncation.

Before:

span<const char>(items, item_size() * num)

After:

span<const char>(items, static_cast<size_t>(item_size()) * num)

This ensures that the result of the multiplication is treated as a size_t, which is the expected type.

[CLAassistant]

All committers have signed the CLA.

[hnwyllmm]

LGTM

[irtaza-shahzad]

hi @hnwyllmm, thank you for the review! Just wanted to kindly follow up to see if this PR is ready to be merged

[hnwyllmm]

Thanks a lot for your contribution.