{input,mixer}/alsa: fix off-by-one bug in count check

Doesn't make a practical difference - but it's more correct this way.

{input,mixer}/alsa: fix off-by-one bug in count check
76a1cae5 · Max Kellermann · 81a97315 · 76a1cae5 · 76a1cae5
Commit 76a1cae5 authored Feb 08, 2017 by Max Kellermann
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Showing with 2 additions and 2 deletions

AlsaInputPlugin.cxx src/input/plugins/AlsaInputPlugin.cxx +1 -1

AlsaMixerPlugin.cxx src/mixer/plugins/AlsaMixerPlugin.cxx +1 -1

No files found.
--- a/src/input/plugins/AlsaInputPlugin.cxx
+++ b/src/input/plugins/AlsaInputPlugin.cxx
@@ -181,7 +181,7 @@ AlsaInputStream::PrepareSockets()
 	}

 	int count = snd_pcm_poll_descriptors_count(capture_handle);
-	if (count < 0) {
+	if (count <= 0) {
 		ClearSocketList();
 		return std::chrono::steady_clock::duration(-1);
 	}

--- a/src/mixer/plugins/AlsaMixerPlugin.cxx
+++ b/src/mixer/plugins/AlsaMixerPlugin.cxx
@@ -102,7 +102,7 @@ AlsaMixerMonitor::PrepareSockets()
 	}

 	int count = snd_mixer_poll_descriptors_count(mixer);
-	if (count < 0)
+	if (count <= 0)
 		count = 0;

 	struct pollfd *pfds = pfd_buffer.Get(count);