Revert "Get rid of MSVC's __int64"

This reverts commit d63f79325f.

Minecraft.World/FileInputStream.cpp

@@ -164,8 +164,8 @@ void FileInputStream::close()
 	{
 		//printf("\n\nFileInputStream::close - TRYING TO CLOSE AN INVALID FILE HANDLE\n\n");
 		return;
-	}
-
+	}	
+	
 	BOOL result = CloseHandle( m_fileHandle );
 
 	if( result == 0 )
@@ -185,7 +185,7 @@ void FileInputStream::close()
 //n - the number of bytes to be skipped.
 //Returns:
 //the actual number of bytes skipped.
-int64_t FileInputStream::skip(int64_t n)
+__int64 FileInputStream::skip(__int64 n)
 {
 #ifdef _XBOX
 	LARGE_INTEGER li;