rtsp-stream: Don't mix IPv4 and IPv6 addresses
rtsp-stream: Don't mix IPv4 and IPv6 addresses

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=726362

thaytan/gst-rtsp-server,hsteinhaus/gst-rtsp-server,surround-io/gst-rtsp-server,surround-io/gst-rtsp-server,Lachann/gst-rtsp-server,barisdemiray/gst-rtsp-server,Lachann/gst-rtsp-server,barisdemiray/gst-rtsp-server,Lachann/gst-rtsp-server,thaytan/gst-rtsp-server,hsteinhaus/gst-rtsp-server,surround-io/gst-rtsp-server,thaytan/gst-rtsp-server,barisdemiray/gst-rtsp-server,hsteinhaus/gst-rtsp-server