pipewire: don't drain empty streams

Fixes the following assert when seeking more than one time past the end of the file.

src/audio_output/dec.c:1107: vlc_aout_stream_Drain: Assertion `!atomic_load_explicit(&stream->drained, memory_order_relaxed)' failed.

Calling pw_stream_flush(s->stream, true), when empty, leads to undefined behavior and might cause the stream_drained() callback to be called in loop (leading to the mentioned assert after a flush).

changed milestone to %4.0

added Component::Audio: Linux plugins label

changed the description

added 1 commit

• c8454604 - pipewire: don't drain empty streams

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added MRStatus::NotCompliant label

added MRStatus::Reviewable label and removed MRStatus::NotCompliant label

added MRStatus::Accepted label and removed MRStatus::Reviewable label

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added 132 commits

• c8454604...3a325614 - 131 commits from branch videolan:master
• beecec04 - pipewire: don't drain empty streams

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merged