avsync-lib: set video peek in AMASTER mode

To avoid VIDEO_START sent by video.c to affect audio pipeline.

Change-Id: I8e62e340231b2d698fc92003bac58e46e4ec601b
diff --git a/avsync-lib/src/tsync.c b/avsync-lib/src/tsync.c
index 6191529..4e509d8 100644
--- a/avsync-lib/src/tsync.c
+++ b/avsync-lib/src/tsync.c
@@ -166,7 +166,9 @@
     return config_sys_node(TSYNC_MODE, val);
 }
 
+/* do not send VIDEO_START from video.c */
 int tsync_set_video_peek_mode(int session)
 {
+    log_info("set video peek");
     return video_device_ioctl(AMSTREAM_IOC_SET_VIDEOPEEK, 0);
 }