Fix warnnings

@@ -69,7 +69,7 @@
     _yValues = yValues;
 
     //make the _yLabelSum value dependant of the distinct values of yValues to avoid duplicates on yAxis
-    int yLabelsDifTotal = [NSSet setWithArray:yValues].count;
+    int yLabelsDifTotal = (int)[NSSet setWithArray:yValues].count;
     _yLabelSum = yLabelsDifTotal % 2 == 0 ? yLabelsDifTotal : yLabelsDifTotal + 1;
 
     if (_yMaxValue) {

@@ -138,7 +138,6 @@
         for (int index = 0; index < yLabels.count; index++) {
             labelText = yLabels[index];
             
-#warning modify origin
             NSInteger y = (NSInteger)(_chartCavanHeight - index * yStepHeight);
             
             PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, y, (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
@@ -260,7 +259,7 @@
             CGPoint p2 = [linePointsArray[i + 1] CGPointValue];
 
             // Closest distance from point to line
-            float distance = fabsf(((p2.x - p1.x) * (touchPoint.y - p1.y)) - ((p1.x - touchPoint.x) * (p1.y - p2.y)));
+            float distance = fabs(((p2.x - p1.x) * (touchPoint.y - p1.y)) - ((p1.x - touchPoint.x) * (p1.y - p2.y)));
             distance /= hypot(p2.x - p1.x, p1.y - p2.y);
 
             if (distance <= 5.0) {
@@ -292,7 +291,7 @@
             CGPoint p1 = [linePointsArray[i] CGPointValue];
             CGPoint p2 = [linePointsArray[i + 1] CGPointValue];
 
-            float distanceToP1 = fabsf(hypot(touchPoint.x - p1.x, touchPoint.y - p1.y));
+            float distanceToP1 = fabs(hypot(touchPoint.x - p1.x, touchPoint.y - p1.y));
             float distanceToP2 = hypot(touchPoint.x - p2.x, touchPoint.y - p2.y);
 
             float distance = MIN(distanceToP1, distanceToP2);