Fixed issue that caused LineChart to crash.

Author: PhilJay

MPChartLib/src/com/github/mikephil/charting/charts/LineChart.java

@@ -133,6 +133,9 @@ protected void drawData() {
  LineDataSet dataSet = dataSets.get(i);
  ArrayList<Entry> entries = dataSet.getYVals();
 
+ if (entries.size() < 1)
+ continue;
+
  mRenderPaint.setStrokeWidth(dataSet.getLineWidth());
  mRenderPaint.setPathEffect(dataSet.getDashPathEffect());
 
@@ -240,7 +243,7 @@ && isOffContentBottom(valuePoints[j + 1]))
 
  Path line = generateLinePath(entries);
  transformPath(line);
- 
+
  mDrawCanvas.drawPath(line, mRenderPaint);
  }
 
@@ -303,7 +306,7 @@ private Path generateFilledPath(ArrayList<Entry> entries, float fillMin) {
 
  return filled;
  }
- 
+
  /**
  * Generates the path that is used for drawing a single line.
  *