fix crash when opening loadorjoin a second time

Minecraft.Client/Common/Network/SessionInfo.h

@@ -131,6 +131,6 @@ public:
 	~FriendSessionInfo()
 	{
 		if(displayLabel!=NULL)
-			delete displayLabel;
+			delete[] displayLabel;
 	}
 };

Minecraft.Client/Common/UI/UIScene_LoadOrJoinMenu.cpp

@@ -290,13 +290,7 @@ UIScene_LoadOrJoinMenu::~UIScene_LoadOrJoinMenu()
     g_NetworkManager.SetSessionsUpdatedCallback( NULL, NULL );
     app.SetLiveLinkRequired( false );
 
-    if(m_currentSessions)
+	delete m_currentSessions;
-    {
-        for(AUTO_VAR(it, m_currentSessions->begin()); it < m_currentSessions->end(); ++it)
-        {
-            delete (*it);
-        }
-    }
 
 #if TO_BE_IMPLEMENTED
     // Reset the background downloading, in case we changed it by attempting to download a texture pack