the modeling file help to avoid false positives and increase scanning
accuracy by explaining code Coverity can't see (out of tree libraries);
the model file must be uploaded by an admin to:
https://scan.coverity.com/projects/pulseaudio?tab=analysis_settings
the pa_assert_se() macro needs to be rewritten for Coverity so that
the assignment is not declared a side-effect
Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>