Fix for get_coreclr exception on Windows 32 bit

[DareDevilDenis]

Fix for issue #14

[dnfadmin]

All CLA requirements met.

[DareDevilDenis]

I tested this change on:

• 32 bit Windows: C:\Program Files
• 64 bit Windows, 32 bit Python: C:\Program Files (x86)
• 64 bit Windows, 64 bit Python

[filmor]

I believe you, and I still can't remember what kind of problem this code was supposed to fix :)