Port upstream fix

Author: zacharee

MPChartLib/src/main/java/com/github/mikephil/charting/charts/CombinedChart.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.graphics.Canvas
 import android.util.AttributeSet
 import android.util.Log
+import com.github.mikephil.charting.components.IMarker
 import com.github.mikephil.charting.data.BarData
 import com.github.mikephil.charting.data.BubbleData
 import com.github.mikephil.charting.data.CandleData
@@ -17,6 +18,7 @@ import com.github.mikephil.charting.interfaces.dataprovider.CombinedDataProvider
 import com.github.mikephil.charting.interfaces.datasets.IBarLineScatterCandleBubbleDataSet
 import com.github.mikephil.charting.renderer.CombinedChartRenderer
 
+
 /**
  * This chart class allows the combination of lines, bars, scatter and candle
  * data all displayed in one chart area.
@@ -209,11 +211,13 @@ open class CombinedChart : BarLineChartBase<Entry, IBarLineScatterCandleBubbleDa
             }
 
             // callbacks to update the content
-            val markerItem = marker[i % marker.size]
-            markerItem.refreshContent(e, highlight)
+            if (!marker.isEmpty()) {
+                val markerItem: IMarker = marker[i % marker.size]
+                markerItem.refreshContent(e, highlight)
 
-            // draw the marker
-            markerItem.draw(canvas, pos[0], pos[1])
+                // draw the marker
+                markerItem.draw(canvas, pos[0], pos[1])
+            }
         }
     }