update to zend 1.10.8

diff --git a/library/Zend b/library/Zend
index a6a6d95a75d5a657bd23602ebeb7e8ae3a547cb1..ed28a5569f7d699332c60fa9b1067c9e3ad9b66b 160000 (submodule)
--- a/library/Zend
+++ b/library/Zend
@@ -1 +1 @@
-Subproject commit a6a6d95a75d5a657bd23602ebeb7e8ae3a547cb1
+Subproject commit ed28a5569f7d699332c60fa9b1067c9e3ad9b66b