Adding a node to a collection causes out of bound in vector

[Federico Cavalieri]

Adding a node in a collection after the last one causes out of bound error in simple_collection.cpp around line 211 in memmove:

import module namespace ddl = "http://www.zorba-xquery.com/modules/store/dynamic/collections/ddl";
import module namespace dml = "http://www.zorba-xquery.com/modules/store/dynamic/collections/dml";

ddl:create-collection(xs:QName("ddl:test2"),(<center1/>,<center2/>));
dml:insert-nodes-after(xs:QName("ddl:test2"), dml:collection(xs:QName("ddl:test2"))[2], (<c1/>,<c2/>));