Fix memory leak introduced in the fix for lp:1196020. oops. Caused by not...

Fix memory leak introduced in the fix for lp:1196020. oops. Caused by not freeing found cursor in find_vertices() function.

storage/oqgraph/oqgraph_shim.h

@@ -482,9 +482,10 @@ namespace boost
     // Fix for https://bugs.launchpad.net/oqgraph/+bug/1196020 returning vertex even when not in graph
     // Psuedocode for fix:
     // if count(*) from g->TABLE where source=id or target=id > 0 then return id else return null
-    oqgraph3::cursor* found = new oqgraph3::cursor(const_cast<oqgraph3::graph*>(&g));
-    if (found->seek_to(id, boost::none) &&
-        found->seek_to(boost::none, id)) {
+    oqgraph3::cursor* found_cursor = new oqgraph3::cursor(const_cast<oqgraph3::graph*>(&g));
+    bool found = (found_cursor->seek_to(id, boost::none) && found_cursor->seek_to(boost::none, id));
+    delete found_cursor;
+    if (found) {
       // id is neither a from or a to in a link
       return optional<graph_traits<oqgraph3::graph>::vertex_descriptor>();
     }