sd-bus: make sure dispatch_rqueue() initializes return parameter on all types of success
    
    Let's make sure our own code follows coding style and initializes all
    return values on all types of success (and leaves it uninitialized in
    all types of failure).
    
    (cherry picked from commit c0bc4ec5cc17ac61773d1e9362b0ffa8382c1ff1)
    Related: CVE-2020-1712
    
    patch_name: 0309-sd-bus-make-sure-dispatch_rqueue-initializes-return-.patch
    present_in_specfile: true
    location_in_specfile: 309
    squash_commits: true