control: snd_ctl_ascii_elem_id_get() - do not show unset numid

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

diff --git a/src/control/ctlparse.c b/src/control/ctlparse.c
index 74f76cc..3ed1c64 100644 (file)
--- a/src/control/ctlparse.c
+++ b/src/control/ctlparse.c
@@ -116,14 +116,19 @@ static long long get_integer64(const char **ptr, long long min, long long max)
  */
 char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
 {
-       unsigned int index, device, subdevice;
+       unsigned int numid, index, device, subdevice;
        char buf[256], buf1[32];
+       const char *iface;
 
-       snprintf(buf, sizeof(buf), "numid=%u,iface=%s,name='%s'",
-                               snd_ctl_elem_id_get_numid(id),
-                               snd_ctl_elem_iface_name(
-                                       snd_ctl_elem_id_get_interface(id)),
-                               snd_ctl_elem_id_get_name(id));
+       numid = snd_ctl_elem_id_get_numid(id);
+       iface = snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(id));
+       if (numid > 0) {
+               snprintf(buf, sizeof(buf), "numid=%u,iface=%s,name='%s'",
+                               numid, iface, snd_ctl_elem_id_get_name(id));
+       } else {
+               snprintf(buf, sizeof(buf), "iface=%s,name='%s'",
+                               iface, snd_ctl_elem_id_get_name(id));
+       }
        buf[sizeof(buf)-1] = '\0';
        index = snd_ctl_elem_id_get_index(id);
        device = snd_ctl_elem_id_get_device(id);