Handled sum=0 case for Pie and Donut charts

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-gifted-charts",
-  "version": "0.1.12",
+  "version": "0.1.13",
   "description": "The most complete library for Bar, Line, Area, Pie and Donut charts in React Native. Allows 2D, 3D, gradient, animations and live data updates.",
   "main": "src/index.tsx",
   "files": [

src/PieChart/index.tsx

@@ -278,7 +278,7 @@ export const PieChart = (props: propTypes) => {
     });
   };
 
-  return (
+  return total === 0 ? null : (
     <View style={{transform: [{scaleY: tilt}]}}>
       <Canvas ref={handleCanvas} />
       {(props.centerLabelComponent || (donut && !isDataShifted)) && (