Automatic update of common submodule

From 4f962f7 to 6c0b52c

diff --git a/common b/common
index 4f962f7..6c0b52c 160000 (submodule)
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 4f962f78357a11e545510d48227f41af24bfaab7
+Subproject commit 6c0b52c72c0958952b79b573105a270d7a651b33