Return when found, return error when setting failed.:

src/control/audio.c

@@ -248,8 +248,12 @@ void libvlc_audio_set_channel( libvlc_instance_t *p_instance, char *psz_channel,
             i_ret = var_Set( p_aout, "audio-channels", val );
             if( i_ret < 0 )
             {
-                break;
+		libvlc_exception_raise( p_e, "failed setting audio range" );
+    	    	vlc_object_release( p_aout );
+                return;
             }
+    	    vlc_object_release( p_aout );
+            return; /* Found */
         }
     }
     libvlc_exception_raise( p_e, "Audio channel out of range" );