Log error on unexpected mute field value

diff --git a/bin/khatus_controller b/bin/khatus_controller
index c2e5d91..49195a8 100755 (executable)
--- a/bin/khatus_controller
+++ b/bin/khatus_controller
@@ -137,7 +137,7 @@ function set_volume(    mute, left, right) {
     } else if (mute == "yes") {
         db["volume"] = "X"
     } else {
-        # TODO: Log error - unexpected mute value
+        error("Unexpected value for 'mute' field: " mute)
     }
 }
 
@@ -511,6 +511,10 @@ function debug(location, msg, values,    sep, vals, key, payload) {
     }
 }
 
+function error(msg) {
+    output_msg("ERROR", msg, "/dev/stderr")
+}
+
 function ensure_numeric(n) {
     return n + 0
 }