return value obsolete(?) from Glib::KeyFile::load_from_file

I'm new to *mm but I think the return value of Glib::KeyFile::load_from_file will never be false.

I may have forgotten a case but exceptions are thrown if:
- File access is denied.
- File is accessible but not a valid KeyFile.

In both cases the return value will not be written and stay what it was before even if catching the exception.


Greetings, Rob

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