Not to let the DRM4G stop without checking for pending VMs

[minondoa]

When creating a VM, theres a gap in which if the DRM4G is stopped, it won't get registered, so the next time the DRM4G is started, it won't appear as a host, and the user might never realize it was created. In order to avoid this, try to check if there is any VM in process of being created, and in case that there is, destroy it.