audio-src: add comment about values for unknown values

Signed-off-by: Jonny Lamb <jonny.lamb@collabora.co.uk>

diff --git a/src/empathy-audio-src.c b/src/empathy-audio-src.c
index 7403d9cf4e04455213909099cde708d6ec8adae4..3fa614f5f753e3096b7ddbab27d327128e8118a3 100644 (file)
--- a/src/empathy-audio-src.c
+++ b/src/empathy-audio-src.c
@@ -66,7 +66,9 @@ struct _EmpathyGstAudioSrcPrivate
   pa_context *context;
   GQueue *operations;
 
+  /* 0 if not known yet */
   guint source_output_idx;
+  /* G_MAXUINT if not known yet */
   guint source_idx;
 
   gdouble peak_level;