sync_folders error under windows 7

[f2brossi]

After a vagrant up using the vagrant plugin 0.2.0 or the latest 0.4.1, I got the following errors when synchronizing my folder.

==> test: The server is ready!
ssh_username provider config is deprecated for vagrant-openstack provider.
If you are using it, it will continue to work but we recommend to switch to the
standard vagrant configuration option `config.ssh.username` instead
C:/Users/f2brossi/.vagrant.d/gems/gems/vagrant-openstack-provider-0.4.1/lib/vagrant-openstack-provider/action/sync_folders.rb:63:in `block in call': undefined method `downcase' for nil:NilClass (NoMethodError)
        from C:/Users/f2brossi/.vagrant.d/gems/gems/vagrant-openstack-provider-0.4.1/lib/vagrant-openstack-provider/action/sync_folders.rb:53:in `each'
        from C:/Users/f2brossi/.vagrant.d/gems/gems/vagrant-openstack-provider-0.4.1/lib/vagrant-openstack-provider/action/sync_folders.rb:53:in `call'
        from C:/Users/f2brossi/.vagrant.d/gems/gems/vagrant-openstack-provider-0.4.1/lib/vagrant-openstack-provider/action/sync_folders.rb:16:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/builtin/provision.rb:80:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/builder.rb:116:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/runner.rb:66:in `block in run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/util/busy.rb:19:in `busy'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/runner.rb:66:in `run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/builtin/call.rb:53:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/Users/f2brossi/.vagrant.d/gems/gems/vagrant-openstack-provider-0.4.1/lib/vagrant-openstack-provider/action/connect_openstack.rb:28:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/builtin/config_validate.rb:25:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/builder.rb:116:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/runner.rb:66:in `block in run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/util/busy.rb:19:in `busy'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/action/runner.rb:66:in `run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/machine.rb:196:in `action_raw'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/machine.rb:173:in `block in action'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/environment.rb:434:in `lock'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/machine.rb:161:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/machine.rb:161:in `action'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.6.3/lib/vagrant/batch_action.rb:82:in `block (2 levels) in run'

[f2brossi]

This code below seems to works. i have just decomposed the command and beginning with a downcase.

        hostpath = "#{hostpath}/" if hostpath !~ /\/$/

        # If on Windows, modify the path to work with cygwin rsync
        if @host_os =~ /mswin|mingw|cygwin/
        hostpath = hostpath.downcase 
    hostpath = hostpath.sub(/^([A-Za-z]):\//, "#{Regexp.last_match[1]}/")  
    hostpath = "/cygdrive/#{hostpath}"
        end

I will make a pull request tomorrow.