Remove all MSVC __int64 (#742)

Minecraft.Client/Xbox/Network/NetworkPlayerXbox.cpp

@@ -137,6 +137,6 @@ int NetworkPlayerXbox::GetTimeSinceLastChunkPacket_ms()
 		return INT_MAX;
 	}
 
-	__int64 currentTime = System::currentTimeMillis();
+	int64_t currentTime = System::currentTimeMillis();
 	return (int)( currentTime - m_lastChunkPacketTime );
 }

Minecraft.Client/Xbox/Network/NetworkPlayerXbox.h

@@ -39,5 +39,5 @@ public:
 private:
 	IQNetPlayer *m_qnetPlayer;
 	Socket *m_pSocket;
-	__int64 m_lastChunkPacketTime;
+	int64_t m_lastChunkPacketTime;
 };