Fixed a null exception when using markers with pie chart

danielgindi · danielgindi · commit bef8db1af1f2 · 2016-04-12T14:06:13.000+03:00
diff --git a/MPChartLib/src/com/github/mikephil/charting/charts/Chart.java b/MPChartLib/src/com/github/mikephil/charting/charts/Chart.java
@@ -670,7 +670,9 @@ protected void drawMarkers(Canvas canvas) {
             int xIndex = highlight.getXIndex();
             int dataSetIndex = highlight.getDataSetIndex();
 
-            float deltaX = mXAxis.mAxisRange;
+            float deltaX = mXAxis != null 
+                ? mXAxis.mAxisRange
+                : ((mData == null ? 0.f : mData.getXValCount()) - 1.f);
 
             if (xIndex <= deltaX && xIndex <= deltaX * mAnimator.getPhaseX()) {
 
