Add assertNumbers function in ol/style/expressions
Add assertNumbers function in ol/style/expressions

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