catch for x axis labels where only 1 is present
catch for x axis labels where only 1 is present

mssyogi/d3plus,Jay-Oh-eN/d3plus,DeemaJS/d3plus,kizzyterra14/d3plus,romind/d3plus_sandbox,mayblue9/d3plus,romind/d3plus,bryanph/d3plus,CodeCutterUK/d3plus,alexandersimoes/d3plus,lucasmachadorj/d3plus