Updated 'core'.

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

diff --git a/core b/core
index c597d67371a03ee44d77917b951126919400de6b..0534cf043e6d86f9520087fe2e59a27dc6cd6ea1 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit c597d67371a03ee44d77917b951126919400de6b
+Subproject commit 0534cf043e6d86f9520087fe2e59a27dc6cd6ea1