code: drawterm

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devaudio volume: expose pcm, skip unavailable handles

--- a/kern/devaudio.c

+++ b/kern/devaudio.c

@@ -56,6 +56,8 @@

 	"bass",		Fout, 		50,	50,

 	"speed",	Fin|Fout|Fmono,	Speed,	Speed,

+

+	"pcm",		Fout, 		50,	50,

 	0

 };

@@ -192,7 +194,11 @@

 		j = 0;

 		buf[0] = 0;

 		for(m=0; volumes[m].name; m++){

+			lov = -1;

+			rov = -1;

 			audiodevgetvol(m, &lov, &rov);

+			if(lov < 0 && rov < 0)

+				continue;

 			liv = lov;

 			riv = rov;

 			j += snprint(buf+j, sizeof(buf)-j, "%s", volumes[m].name);