Stop testing DSD rates in gst_alsa_detect_dsd_rates() if the rate becomes zero
or negative. This avoids an infinite loop if gst_alsa_probe_supported_formats()
is used on a PCM sink defined like the following in the ALSA configuration file:
pcm.buggy {
type plug
slave.pcm "buggy_volume"
hint.description "Causes an infinite loop in GStreamer"
}
pcm.buggy_volume {
type softvol
slave.pcm "buggy_dmix"
control.name "buggy_volume"
}
pcm.buggy_dmix {
type dmix
ipc_key 12345
slave {
pcm "hw:0,0"
period_size 1024
buffer_size 4096
}
}
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8985>
