Fix blurred label when coordinates aren't integer

@@ -65,17 +65,17 @@
     NSString *yLabelFormat = self.yLabelFormat ? : @"%1.f";
 
     if (yStep == 0.0) {
-        PNChartLabel *minLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, _chartCavanHeight, _chartMargin, _yLabelHeight)];
+        PNChartLabel *minLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, (NSInteger)_chartCavanHeight, (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
         minLabel.text = [NSString stringWithFormat:yLabelFormat, 0.0];
         [self setCustomStyleForYLabel:minLabel];
         [self addSubview:minLabel];
 
-        PNChartLabel *midLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, _chartCavanHeight / 2, _chartMargin, _yLabelHeight)];
+        PNChartLabel *midLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, (NSInteger)(_chartCavanHeight / 2), (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
         midLabel.text = [NSString stringWithFormat:yLabelFormat, _yValueMax];
         [self setCustomStyleForYLabel:midLabel];
         [self addSubview:midLabel];
 
-        PNChartLabel *maxLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, 0.0, _chartMargin, _yLabelHeight)];
+        PNChartLabel *maxLabel = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, 0.0, (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
         maxLabel.text = [NSString stringWithFormat:yLabelFormat, _yValueMax * 2];
         [self setCustomStyleForYLabel:maxLabel];
         [self addSubview:maxLabel];
@@ -86,7 +86,7 @@
 
         while (num > 0)
         {
-            PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, (_chartCavanHeight - index * yStepHeight), _chartMargin, _yLabelHeight)];
+            PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, (NSInteger)(_chartCavanHeight - index * yStepHeight), (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
             [label setTextAlignment:NSTextAlignmentRight];
             label.text = [NSString stringWithFormat:yLabelFormat, _yValueMin + (yStep * index)];
             [self setCustomStyleForYLabel:label];
@@ -124,7 +124,7 @@
             NSInteger x = 2 * _chartMargin +  (index * _xLabelWidth) - (_xLabelWidth / 2);
             NSInteger y = _chartMargin + _chartCavanHeight;
 
-            PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(x, y, _xLabelWidth, _chartMargin)];
+            PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(x, y, (NSInteger)_xLabelWidth, (NSInteger)_chartMargin)];
             [label setTextAlignment:NSTextAlignmentCenter];
             label.text = labelText;
             [self setCustomStyleForXLabel:label];
@@ -142,6 +142,7 @@
     if (_xLabelColor) {
         label.textColor = _xLabelColor;
     }
+
 }
 
 - (void)setCustomStyleForYLabel:(UILabel *)label