GetMemoryType returns a python integer rather than an mfem MemoryType

[goodman17c]

The GetMemoryType function of an mfem Device is returning a python integer rather than a mfem MemoryType.
I have only observed this from the mfem.ser build using the cpu device type, so this may be the trivial case, but limits code portability between difference hardwares. I have found this to be a problem for constructing a BlockVector with a specified MemoryType.

Below is a minimum code example to demonstrate the issue.

import mfem.ser as mfem
device = mfem.Device("cpu")
mt = device.GetMemoryType()
print(type(mt))