wizard must be optionnal, add G729 payload type

[linphone] / oRTP

diff --git a/oRTP b/oRTP
index 681e777d75b4e04f115034a5a90d3f27b99abe08..92f78b9504915db0220bc6f617f0cd7ad9910771 160000 (submodule)
--- a/oRTP
+++ b/oRTP
@@ -1 +1 @@
-Subproject commit 681e777d75b4e04f115034a5a90d3f27b99abe08
+Subproject commit 92f78b9504915db0220bc6f617f0cd7ad9910771