Updated 'core'.

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

diff --git a/core b/core
index 7bc4014657a70dedfc38b9b28d134aa7c3a6158c..2fa8c1839a405d28950d4c1503270942ace0ca24 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 7bc4014657a70dedfc38b9b28d134aa7c3a6158c
+Subproject commit 2fa8c1839a405d28950d4c1503270942ace0ca24