Re-apply 972d17b...

but not rename the container. Approved-By est31

src/environment.cpp

@@ -1238,7 +1238,7 @@ void ServerEnvironment::step(float dtime)
 			// Read messages from object
 			while(!obj->m_messages_out.empty())
 			{
-				m_active_object_messages.push_back(
+				m_active_object_messages.push(
 						obj->m_messages_out.front());
 				obj->m_messages_out.pop();
 			}
@@ -1462,7 +1462,7 @@ ActiveObjectMessage ServerEnvironment::getActiveObjectMessage()
 		return ActiveObjectMessage(0);
 
 	ActiveObjectMessage message = m_active_object_messages.front();
-	m_active_object_messages.pop_front();
+	m_active_object_messages.pop();
 	return message;
 }
 

src/environment.h

@@ -32,6 +32,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include <set>
 #include <list>
+#include <queue>
 #include <map>
 #include "irr_v3d.h"
 #include "activeobject.h"
@@ -378,7 +379,7 @@ class ServerEnvironment : public Environment
 	// Active object list
 	std::map<u16, ServerActiveObject*> m_active_objects;
 	// Outgoing network message buffer for active objects
-	std::list<ActiveObjectMessage> m_active_object_messages;
+	std::queue<ActiveObjectMessage> m_active_object_messages;
 	// Some timers
 	float m_send_recommended_timer;
 	IntervalLimiter m_object_management_interval;