Fix calling Overlay.panIntoView with no options
Fix calling Overlay.panIntoView with no options

 * API-doc said undefined is OK, code assumed an object

openlayers/openlayers,ahocevar/ol3,stweil/ol3,geekdenz/openlayers,ahocevar/openlayers,stweil/ol3,oterral/ol3,bjornharrtell/ol3,stweil/openlayers,stweil/ol3,geekdenz/openlayers,openlayers/openlayers,oterral/ol3,geekdenz/openlayers,ahocevar/openlayers,ahocevar/ol3,stweil/ol3,ahocevar/ol3,oterral/ol3,adube/ol3,stweil/openlayers,geekdenz/ol3,stweil/openlayers,bjornharrtell/ol3,ahocevar/ol3,ahocevar/openlayers,geekdenz/ol3,geekdenz/ol3,openlayers/openlayers,adube/ol3,adube/ol3,bjornharrtell/ol3,geekdenz/ol3