Updated 'core'.

Signed-off-by: Roland Haeder <roland@mxchange.org>

diff --git a/core b/core
index df42c6e506561f872ee628448945833cad968d28..5b9ee459776eeca35b67ac5643e0bffefbbf5dda 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit df42c6e506561f872ee628448945833cad968d28
+Subproject commit 5b9ee459776eeca35b67ac5643e0bffefbbf5dda