Update timeside-diadems submodule

diff --git a/lib/timeside-diadems b/lib/timeside-diadems
index 31478d48b375a1996d816ef9900963d319c3076c..8d52536cecfbd915602ebf5249fdebb0c935beb1 160000 (submodule)
--- a/lib/timeside-diadems
+++ b/lib/timeside-diadems
@@ -1 +1 @@
-Subproject commit 31478d48b375a1996d816ef9900963d319c3076c
+Subproject commit 8d52536cecfbd915602ebf5249fdebb0c935beb1