0.7.8 && render segments if exists

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@chartwerk/line-pod",
-  "version": "0.7.7",
+  "version": "0.7.8",
   "description": "Chartwerk line chart",
   "main": "dist/index.js",
   "files": [

src/index.ts

@@ -45,14 +45,16 @@ class LinePod extends ChartwerkPod<LineTimeSerie, LineOptions> {
       const generator = this.getRenderGenerator(serie.renderArea, serie.yOrientation);
       this._renderMetric(serie, generator);
     }
-    if(this._markersConf !== undefined) {
+    if(!_.isEmpty(this._markersConf)) {
       this._markersLayer = new Markers(this.d3Node, this._markersConf, this.state, this.margin);
       this._markersLayer.render(this.metricContainer, this.height);
     }
 
+    if(!_.isEmpty(this._segmentSeries)) {
       this._segmentsLayer = new Segments(this._segmentSeries, this.state);
       this._segmentsLayer.render(this.metricContainer, this.chartContainer);
     }
+  }
 
   clearAllMetrics(): void {
     // TODO: temporary hack before it will be implemented in core.