Updated 'core'.

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

diff --git a/core b/core
index 2b6327b96c604709e7b244b0171b753a13f7d270..1f81d21b97669832b84da3680d046eb9e4afba64 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 2b6327b96c604709e7b244b0171b753a13f7d270
+Subproject commit 1f81d21b97669832b84da3680d046eb9e4afba64