Fixes issue with ScaleLine
Fixes issue with ScaleLine

Math.pow with negative exponents is inaccurate in chrome v74. `toFixed`
is called on the result to fix this.

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