Make these a little clearer

Author: danielgindi

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

@@ -1345,7 +1345,7 @@ public int getLowestVisibleXIndex() {
                 mViewPortHandler.contentLeft(), mViewPortHandler.contentBottom()
         };
         getTransformer(AxisDependency.LEFT).pixelsToValue(pts);
-        return (pts[0] <= 0) ? 0 : (int) (pts[0] + 1.0f);
+        return (pts[0] <= 0) ? 0 : (int)Math.ceil(pts[0]);
     }
 
     /**
@@ -1360,7 +1360,7 @@ public int getHighestVisibleXIndex() {
                 mViewPortHandler.contentRight(), mViewPortHandler.contentBottom()
         };
         getTransformer(AxisDependency.LEFT).pixelsToValue(pts);
-        return (pts[0] >= mData.getXValCount()) ? mData.getXValCount() - 1 : (int) pts[0];
+        return Math.min(mData.getXValCount() - 1, (int)Math.floor(pts[0]));
     }
 
     /**