Updated to latest 'core'.

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

diff --git a/core b/core
index 71a395b898edb7aa582bac0a68ece9f6fbe9edcf..5a0a8451fdbd0d07d5cda916f2ed951ee54f0dcd 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 71a395b898edb7aa582bac0a68ece9f6fbe9edcf
+Subproject commit 5a0a8451fdbd0d07d5cda916f2ed951ee54f0dcd