fixed https://sonarcloud.io/project/issues?id=org.xmage%3Amage-root&issues=AWIlv32RgrzAwlaaQ7rP&open=AWIlv32RgrzAwlaaQ7rP

Mage.Client/src/main/java/mage/client/cards/ManaPieChart.java

@@ -68,6 +68,10 @@ public class ManaPieChart extends JComponent {
             total += slices[i].value;
         }
         
+        if (total == 0.0D) {
+            return; //there are no slices or no slices with a value > 0, stop here
+        }
+
         double curValue = 0.0D;
         int startAngle = 0;
         int lastAngle = 0;