fwlib: only print warning if the list of dups is not empty
fwlib: only print warning if the list of dups is not empty

freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,nirbheek/cerbero-old,nirbheek/cerbero-old,centricular/cerbero,shoreflyer/cerbero,BigBrother-International/gst-cerbero,fluendo/cerbero,GStreamer/cerbero,davibe/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,cee1/cerbero-mac,shoreflyer/cerbero,jackjansen/cerbero,GStreamer/cerbero,atsushieno/cerbero,sdroege/cerbero,nirbheek/cerbero-old,ylatuya/cerbero,EricssonResearch/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,multipath-rtp/cerbero,superdump/cerbero,fluendo/cerbero,GStreamer/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,ramaxlo/cerbero,OptoFidelity/cerbero,AlertMe/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,GStreamer/cerbero,nzjrs/cerbero,ikonst/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,AlertMe/cerbero,shoreflyer/cerbero,ikonst/cerbero,multipath-rtp/cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,davibe/cerbero,superdump/cerbero,brion/cerbero,BigBrother-International/gst-cerbero,brion/cerbero,centricular/cerbero,atsushieno/cerbero,nzjrs/cerbero,atsushieno/cerbero,justinjoy/cerbero,OptoFidelity/cerbero,ylatuya/cerbero,shoreflyer/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,superdump/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,lubosz/cerbero,AlertMe/cerbero,superdump/cerbero,justinjoy/cerbero,flexVDI/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,justinjoy/cerbero,lubosz/cerbero,cee1/cerbero-mac,ylatuya/cerbero,cee1/cerbero-mac,centricular/cerbero,ikonst/cerbero,ford-prefect/cerbero,cee1/cerbero-mac,multipath-rtp/cerbero,ramaxlo/cerbero,lubosz/cerbero,flexVDI/cerbero,GStreamer/cerbero,fluendo/cerbero,ramaxlo/cerbero,flexVDI/cerbero,sdroege/cerbero,davibe/cerbero,jackjansen/cerbero,BigBrother-International/gst-cerbero,OptoFidelity/cerbero,ramaxlo/cerbero,nzjrs/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,ford-prefect/cerbero,AlertMe/cerbero,brion/cerbero,fluendo/cerbero,lubosz/cerbero,AlertMe/cerbero,centricular/cerbero,sdroege/cerbero,brion/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,ikonst/cerbero,jackjansen/cerbero,nzjrs/cerbero,ford-prefect/cerbero,shoreflyer/cerbero,flexVDI/cerbero,flexVDI/cerbero,ylatuya/cerbero,davibe/cerbero,multipath-rtp/cerbero,OptoFidelity/cerbero,nirbheek/cerbero,nirbheek/cerbero-old,jackjansen/cerbero,BigBrother-International/gst-cerbero,BigBrother-International/gst-cerbero,EricssonResearch/cerbero,nzjrs/cerbero,ford-prefect/cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,EricssonResearch/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,justinjoy/cerbero,atsushieno/cerbero,centricular/cerbero,fluendo/cerbero,ikonst/cerbero