hack to fix an issue in natpmp and upnp

src/natpmp.cpp

@@ -73,6 +73,10 @@ natpmp::natpmp(io_service& ios, address const& listen_interface
 	, m_disabled(false)
 	, m_abort(false)
 {
+	// unfortunately async operations rely on the storage
+	// for this array not to be reallocated, by passing
+	// around pointers to its elements. so reserve size for now
+	m_mappings.reserve(10);
 	rebind(listen_interface);
 }
 

src/upnp.cpp

@@ -88,6 +88,8 @@ upnp::upnp(io_service& ios, connection_queue& cc
 		m_mappings.swap(s->mappings);
 		delete s;
 	}
+
+	m_mappings.reserve(10);
 }
 
 void* upnp::drain_state()