alsa: Improve help text of --device.

The new text gives the user a hint how to find out about the devices
ALSA knows about.

diff --git a/m4/gengetopt/alsa_write.m4 b/m4/gengetopt/alsa_write.m4
index 04b4963d3a9fbe6bc342ffa808ae6f33a8a168fa..73d9805fc1564f334359d5150c1c56ba02045539 100644 (file)
--- a/m4/gengetopt/alsa_write.m4
+++ b/m4/gengetopt/alsa_write.m4
@@ -8,11 +8,12 @@ include(header.m4)
 option "device" d
 #~~~~~~~~~~~~~~~~
 "set PCM device"
-string typestr="device"
-default="default"
+string typestr = "device"
+default = "default"
 optional
-details="
-       On systems with dmix, a better choice than the default
-       value might be to use \"plug:swmix\".
+details = "
+       Check for the presence of a /proc/asound/ directory to see if
+       ALSA is present in your kernel. The file /proc/asound/devices
+       contains all devices ALSA knows about.
 "
 </qu>