[PATCH] mpr: Properly handle device-less connections.

[Pierre Schweitzer]

Hi,

Please find attached a patch that handles the case where a connection
without device is returned in the connected resources enumeration.
This allows cancel all connections without device.

Cf. https://msdn.microsoft.com/fr-fr/c53d078e-188a-4371-bdb9-fc023bc0c1ba
https://docs.microsoft.com/en-us/windows/desktop/api/winnetwk/nf-winnetwk-wn...

Cheers,
Pierre