VOM: favour make_shared

Change-Id: I0c5e198049d510f3b3f9a6aefe49c315449768e3
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
diff --git a/src/vpp-api/vom/interface_span.cpp b/src/vpp-api/vom/interface_span.cpp
index 5bdbda9..9243f2d 100644
--- a/src/vpp-api/vom/interface_span.cpp
+++ b/src/vpp-api/vom/interface_span.cpp
@@ -132,8 +132,8 @@
 void
 interface_span::event_handler::handle_populate(const client_db::key_t& key)
 {
-  std::shared_ptr<interface_span_cmds::dump_cmd> cmd(
-    new interface_span_cmds::dump_cmd());
+  std::shared_ptr<interface_span_cmds::dump_cmd> cmd =
+    std::make_shared<interface_span_cmds::dump_cmd>();
 
   HW::enqueue(cmd);
   HW::write();