Update core

Signed-off-by: Vincent Zanotti <vincent.zanotti@m4x.org>

diff --git a/core b/core
index ebde1ae..9f671b1 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit ebde1aef351c87babbc242d8a799073666b3cbe1
+Subproject commit 9f671b1782f8abbdf718b3cedb90f2b7ee81550d