Add missed error description

Change-Id: I8ca103f942fed8a63864caa7fb71db486b1387c5
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>

diff --git a/include/tts.h b/include/tts.h
index 80e690ca9928b75c0fadadb46cfd92ef51e8d254..142acd846d303f4c5ebf9aba9d3c2a78dcba48e6 100644 (file)
--- a/include/tts.h
+++ b/include/tts.h
@@ -585,6 +585,7 @@ int tts_get_error_message(tts_h tts, char** err_msg);
  * @retval #TTS_ERROR_NOT_SUPPORTED TTS NOT supported
  * @retval #TTS_ERROR_INVALID_PARAMETER Invalid parameter
  * @retval #TTS_ERROR_INVALID_STATE Invalid state
+ * @retval #TTS_ERROR_OPERATION_FAILED Operation failure
  * @pre The TTS state should be one of: #TTS_STATE_READY, #TTS_STATE_PLAYING, #TTS_STATE_PAUSED.
  * @see tts_play()
  * @see tts_stop()