1. Fixed memory leak in shared_ptr loading

2. Fixed error in polymorphic archive implementation

[SVN r58258]

libs/serialization

@@ -1 +1 @@
-Subproject commit a94e39ed5d7d21f84f24a39043ac388d5f864bde
+Subproject commit 4773b7d2a20cabb933fdba06f13837a2ebc10543