Updated core.

diff --git a/core b/core
index 6bf60b1accb36abe10787a06fc4d663f0c78efa9..1956ac6a5f89588c5cf1e10c0cbd0a14915c4646 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 6bf60b1accb36abe10787a06fc4d663f0c78efa9
+Subproject commit 1956ac6a5f89588c5cf1e10c0cbd0a14915c4646