fix: add condition for noDatapoints state

- see #134

dist/color_legend.js

@@ -366,17 +366,17 @@ System.register(["lodash", "jquery", "d3", "./libs/d3-scale-chromatic/index", "a
               if (ctrl.bucketMatrix) {
                 var rangeFrom = ctrl.bucketMatrix.minValue;
                 var rangeTo = ctrl.bucketMatrix.maxValue;
-                var maxValue = panel.color.max || rangeTo;
-                var minValue = panel.color.min || rangeFrom;
+                var maxValue = panel.color.max != null ? panel.color.max : rangeTo;
+                var minValue = panel.color.min != null ? panel.color.min : rangeFrom;
 
                 if (ctrl.bucketMatrix.noDatapoints) {
-                  if (!panel.color.max) {
+                  if (panel.color.max != null) {
                     rangeTo = maxValue = 100;
                   } else {
                     rangeTo = 100;
                   }
 
-                  if (!panel.color.min) {
+                  if (panel.color.min != null) {
                     rangeFrom = minValue = 0;
                   } else {
                     rangeFrom = 0;

dist/rendering.js

@@ -462,8 +462,8 @@ System.register(["lodash", "jquery", "moment", "app/core/utils/kbn", "app/core/c
           value: function addStatusmap() {
             var _this = this;
 
-            var maxValue = this.panel.color.max || this.bucketMatrix.maxValue;
-            var minValue = this.panel.color.min || this.bucketMatrix.minValue;
+            var maxValue = this.panel.color.max != null ? this.panel.color.max : this.bucketMatrix.maxValue;
+            var minValue = this.panel.color.min != null ? this.panel.color.min : this.bucketMatrix.minValue;
 
             if (this.panel.color.mode !== 'discrete') {
               this.colorScale = this.getColorScale(maxValue, minValue);