Again updated 'core'.

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

diff --git a/core b/core
index 0534cf043e6d86f9520087fe2e59a27dc6cd6ea1..c8fb3b209b8a11cdcbff77fb790739490816ad0e 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 0534cf043e6d86f9520087fe2e59a27dc6cd6ea1
+Subproject commit c8fb3b209b8a11cdcbff77fb790739490816ad0e