ICU-22807 Fix for missing __STDC_FORMAT_MACROS before inttypes.h

[barracuda156]

This is a trivial fix for the issue which we have already addressed earlier. But now another instance of the same has to be fixed. See:
https://unicode-org.atlassian.net/browse/ICU-22807

Checklist

• Required: Issue filed: https://unicode-org.atlassian.net/browse/ICU-22807
• Required: The PR title must be prefixed with a JIRA Issue number.
• Required: The PR description must include the link to the Jira Issue, for example by completing the URL in the first checklist item
• Required: Each commit message must be prefixed with a JIRA Issue number.
• Issue accepted (done by Technical Committee after discussion)
• Tests included, if applicable
• API docs and/or User Guide docs changed or added, if applicable

[richgillam]

Looks okay and matches an earlier fix that we all approved.

[jira-pull-request-webhook]

Notice: the branch changed across the force-push!

• icu4c/source/i18n/messageformat2_function_registry.cpp is different

View Diff Across Force-Push

~ Your Friendly Jira-GitHub PR Checker Bot

[barracuda156]

@markusicu I have committed your suggestion. (Sorry, should have done that earlier…)

@richgillam Updated and rebased now.

[markusicu]

Thanks @barracuda156 !