MSVC 2022 compiler fixes + minor correction for older Hydra APIs

[boberfly]

Hi, I just have some small fixes when compiling with MSVC 2022 and targetting an older Hydra API (USD 23.02).

First commit has the compiler fixes (changing operator notation and to && and not to !) and the second commit has the comma fix for old hydra APIs.

I used these fixes for release/v0.29.0 but I thought I'd target the dev branch for upstreaming.

Cheers

[seando-adsk]

@boberfly Thanks for the pull-request. Just so you are aware of our process. Any PRs from external clients are first assigned to an internal Autodesk dev for code review. Once approved, we will launch a preflight build (by assigning the PR to the creator - something an external user is not allowed to do - for security reasons). If the preflight fails (build or test, we will post the results in a comment for you to fix, and re-run preflight, if needed). Note: for security reasons we also don't post the full build logs, so the details link next to a preflight doesn't contain any log info. Once a successful preflight run is done, we add the label "ready for merge" and then one of our admins (usually me) will merge the PR.

FYI, I started the preflight but it failed the clang-format step. You can click the details next to clang-format to see the results. Please see our codingGuidelines.md for more info.

Sean