update ms2

diff --git a/mediastreamer2 b/mediastreamer2
index 63aef125c633be420f4a162b2e7526339674f4a2..a964bf24c47febe55276a8b5ef3e323503c08668 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit 63aef125c633be420f4a162b2e7526339674f4a2
+Subproject commit a964bf24c47febe55276a8b5ef3e323503c08668