sd-bus: make rqueue/wqueue sizes of type size_t
    
    Let's do this like we usually do and size arrays with size_t.
    
    We already do this for the "allocated" counter correctly, and externally
    we expose the queue sizes as uint64_t anyway, hence there's really no
    point in usigned "unsigned" internally.
    
    (cherry picked from commit 143d4e045a798ccc87889b2a8a60d7fbe44be441)
    Related: CVE-2020-1712
    
    patch_name: 0307-sd-bus-make-rqueue-wqueue-sizes-of-type-size_t.patch
    present_in_specfile: true
    location_in_specfile: 307
    squash_commits: true