statistics line bar has now a clearer labeling

src/de/tudarmstadt/informatik/hostage/ui2/fragment/StatisticsFragment.java

@@ -883,7 +883,9 @@ public class StatisticsFragment extends Fragment implements ChecklistDialog.Chec
         int maxY = (int)(rangeMax_Y - rangeMin_Y);
         this.lineGraph.setYAxisStep(Math.min(maxY, 5));
         int yStep = (int)this.lineGraph.getyAxisStep();
-        maxY = maxY + (yStep - (maxY % yStep));
+        if ((maxY % yStep) != 0) {
+            maxY = maxY + (yStep - (maxY % yStep));
+        }
         this.lineGraph.setRangeY(rangeMin_Y, rangeMin_Y + maxY);
         this.lineGraph.setLineToFill(0);
         this.lineGraph.invalidate();