Exception when refreshing the Album and Artist pages

[kingosticks]

Uncaught TypeError: Cannot read property 'library' of undefined
    at Object.showArtist (http://localhost:6681/musicbox_webclient/js/library.js:281:19)
    at locationHashChanged (http://localhost:6681/musicbox_webclient/js/gui.js:402:25)
    at Object.trigger (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:3:11522)
    at http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:3:18895
    at Function.each (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:2881)
    at n.fn.init.each (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:846)
    at n.fn.init.trigger (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:3:18871)
    at n.fn.init.a.fn.(anonymous function) [as hashchange] (http://localhost:6681/musicbox_webclient/vendors/jquery_mobile/jquery.mobile-1.3.2.min.js:2:13015)
    at HTMLDocument.<anonymous> (http://localhost:6681/musicbox_webclient/js/gui.js:437:15)
    at i (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:27451)
    at Object.fireWith [as resolveWith] (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:28215)
    at Function.ready (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:30008)
    at HTMLDocument.K (http://localhost:6681/musicbox_webclient/vendors/jquery/jquery-1.12.0.min.js:2:30370)

Steps to reproduce:

• Navigate to an Artist or Album listing by selecting "Show artist"/"Show album" from the popup menu or from the search results.
• Refresh the page

Have not looked to see when this was introduced. Not sure of the best way to fix it either. My first guess would be to track the connection state via an isConnected variable and check it before trying to access mopidy.library in showArtist and showAlbum. There is probably a more elegant way...