update ms2

diff --git a/mediastreamer2 b/mediastreamer2
index eb538cd19f9ee0a9da7669b1a439f81014180981..502db41537d8f39cacf7ba0b17fc2011db745fed 160000 (submodule)
--- a/mediastreamer2
+++ b/mediastreamer2
@@ -1 +1 @@
-Subproject commit eb538cd19f9ee0a9da7669b1a439f81014180981
+Subproject commit 502db41537d8f39cacf7ba0b17fc2011db745fed