Add error description to doxygen

Change-Id: If87db8338ea2d654a659f2070dfd6cf3888f1126
Signed-off-by: cheoleun <chleun.moon@samsung.com>

diff --git a/include/net_connection.h b/include/net_connection.h
index ae22d41..2e0c5a3 100755 (executable)
--- a/include/net_connection.h
+++ b/include/net_connection.h
@@ -285,6 +285,7 @@ typedef enum {
  * @retval #CONNECTION_ERROR_NONE                  Successful
  * @retval #CONNECTION_ERROR_INVALID_PARAMETER     Invalid parameter
  * @retval #CONNECTION_ERROR_OUT_OF_MEMORY         Out of memory
+ * @retval #CONNECTION_ERROR_PERMISSION_DENIED     Permission denied
  * @see connection_destroy()
  */
 int connection_create(connection_h* connection);