VNC port does not display properly when already configured

[ndd314]

After VNC has been configured, the vnc command will return the object_id for port instead of the actual port number. Example:

> vnc 0
VNC already enabled
spawning /usr/bin/vinagre
192.168.0.100:#<RbVmomi::VIM::OptionValue:0xb747060> password: ********