Updated 'core'.

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

diff --git a/core b/core
index 1f81d21b97669832b84da3680d046eb9e4afba64..a0551c30b2e11aadba3f0513ef67c36ca7e60552 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 1f81d21b97669832b84da3680d046eb9e4afba64
+Subproject commit a0551c30b2e11aadba3f0513ef67c36ca7e60552