Fixed issue with legend values when all values are negative and some are null, #1468

src/app/components/timeSeries.js

@@ -86,6 +86,7 @@ function (_, kbn) {
         }
         }
       }
       }
 
 
+      if (currentValue !== null) {
         if (_.isNumber(currentValue)) {
         if (_.isNumber(currentValue)) {
           this.stats.total += currentValue;
           this.stats.total += currentValue;
           this.allIsNull = false;
           this.allIsNull = false;
@@ -98,6 +99,7 @@ function (_, kbn) {
         if (currentValue < this.stats.min) {
         if (currentValue < this.stats.min) {
           this.stats.min = currentValue;
           this.stats.min = currentValue;
         }
         }
+      }
 
 
       result.push([currentTime, currentValue]);
       result.push([currentTime, currentValue]);
     }
     }