fixed upnp bug that could cause stack overflow

ChangeLog

@@ -61,6 +61,7 @@ release 0.14.2
 	  from resume data properly
 	* removed locale dependency in xml parser (caused asserts on windows)
 	* fixed bug when talking to https 1.0 servers
+	* fixed UPnP bug that could cause stack overflow
 
 release 0.14.1
 

src/upnp.cpp

@@ -637,6 +637,7 @@ void upnp::update_map(rootdevice& d, int i)
 		std::stringstream msg;
 		msg << "mapping " << i << " does not need updating, skipping";
 		log(msg.str());
+		m.action = mapping_t::action_none;
 		next(d, i);
 		return;
 	}
@@ -651,6 +652,7 @@ void upnp::update_map(rootdevice& d, int i)
 	{
 		if (m.failcount > 5)
 		{
+			m.action = mapping_t::action_none;
 			// giving up
 			next(d, i);
 			return;