fix: reporting wrong memory amount for xen host

# -*- coding: utf-8 -*-

from libvirtwrapper import LibvirtHypervisor

from libvirtwrapper import LibvirtHypervisor, MEGABYTE_DIV

class XenHypervisor(LibvirtHypervisor):

    def get_mem(self):

        '''

        '''

        # real machine memory is the max allocatable size of the Dom0

        mem = None

        try:

            dom0 = self._lvcon_handle.lookupByID(0)

            data = dom0.info()[1]

            data = self._lvcon_handle.getInfo()[1]

            if data:

                mem = data

                mem = data * MEGABYTE_DIV

        except:

            pass

        return mem