Treat "about:blank" and "" equally in midori_view_set_uri
Treat "about:blank" and "" equally in midori_view_set_uri

This solves the problem of open speed dial tabs in the session
coming back as blank tabs after a restart of Midori.


dokidokivisual/midori,dokidokivisual/midori,dokidokivisual/midori,dokidokivisual/midori,dokidokivisual/midori