Add isset check to prevent undefined index when Content-Type header #559
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I faced an issue where LogAPIResponseToLog() threw "Content-Type on null" and
null comparison errors because it assumed the Content-Type header was
always present.
This fix adds an isset() check before accessing the Content-Type key,
so XML parsing is only attempted when the header exists.
With this change, API response logging no longer breaks when the
Content-Type header is missing or has unexpected values, making it
safer and more reliable.