One unit test opened HKEY_LOCAL_MACHINE for testing, but it seems Mono on Linux doesn't grant even read access to this (emulated) key, so the unit test now uses HKEY_CURRENT_USER

git-svn-id: file:///srv/devel/repo-conversion/nusu@321 d2e56fa2-650e-0410-a79f-9358c0239efd

Source/Settings/WindowsRegistryStore.Test.cs

@@ -93,7 +93,7 @@ namespace Nuclex.Support.Settings {
         () => {
           using(
             var store = new WindowsRegistryStore(
-              RegistryHive.LocalMachine, "SOFTWARE", writable: false
+              RegistryHive.CurrentUser, "", writable: false
             )
           ) { }
         },