Fixed bug with missing index param in fnc call to label interpolation
Fixed bug with missing index param in fnc call to label interpolation

gionkunz/chartist-js,hansmaad/chartist-js,chartist-js/chartist,cr3ative/chartist-js,chartist-js/chartist,hansmaad/chartist-js,gionkunz/chartist-js,cr3ative/chartist-js,chartist-js/chartist