alsa-mixer: improve check for the empty path set for sink/source

The unused mixer instances are created without this code.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/modules/alsa/alsa-mixer.c b/src/modules/alsa/alsa-mixer.c
index a3c998b65..d184aec7a 100644
--- a/src/modules/alsa/alsa-mixer.c
+++ b/src/modules/alsa/alsa-mixer.c
@@ -741,6 +741,12 @@ void pa_alsa_path_set_free(pa_alsa_path_set *ps) {
     pa_xfree(ps);
 }
 
+int pa_alsa_path_set_is_empty(pa_alsa_path_set *ps) {
+    if (ps && !pa_hashmap_isempty(ps->paths))
+        return 0;
+    return 1;
+}
+
 static long to_alsa_dB(pa_volume_t v) {
     return lround(pa_sw_volume_to_dB(v) * 100.0);
 }