Fixed conflict between min/max macros and std::min/max when using GCC >= 4.2.

game/server/physics_main.cpp

@@ -2042,7 +2042,7 @@ void Physics_RunThinkFunctions( bool simulating )
 	{
 		UTIL_DisableRemoveImmediate();
 		int listMax = SimThink_ListCount();
-		listMax = max(listMax,1);
+		listMax = MAX(listMax,1);
 		CBaseEntity **list = (CBaseEntity **)stackalloc( sizeof(CBaseEntity *) * listMax );
 		// iterate through all entities and have them think or simulate