Merge pull request #121 from noahamac/master

adding error handling for no results in the LFG viz

src/examples/liquid_fill_gauge/liquid_fill_gauge.ts

@@ -208,7 +208,7 @@ const vis: LiquidFillGaugeVisualization = {
     this.svg.attr('id', elementId)
   },
   // Render in response to the data or settings changing
-  update(data, element, config, queryResponse) {
+  update(data, element, config, queryResponse, details) {
     if (!handleErrors(this, queryResponse, {
       min_pivots: 0, max_pivots: 0,
       min_dimensions: 0, max_dimensions: undefined,
@@ -222,6 +222,9 @@ const vis: LiquidFillGaugeVisualization = {
       if (gaugeConfig.maxValue <= 0) {
         this.addError({ group: 'config', title: 'Max value must be greater than zero.' })
         return
+      } else if (data.length === 0) {
+        this.addError({ title: 'No results.' })
+        return
       } else {
         this.clearErrors('config')
       }