printf() is a horrible interface as it does no type checking.
Let's at least use the compiler to check format strings and
arguments. This obviously doesn't work for translated strings
and using report_error on translated strings is dubious. But OK.
Had to convert a number of report_error() calls to supress
warnings.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
get_changes_made(), subsurface_user_agent() and normalize_cloud_name()
are only called from C++.
Avoids having to manually free the returned value and is therefore
more robust against leaks.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
