Fix netlist regression issue for IC

diylc/diylc-library/src/org/diylc/components/semiconductors/DIL_IC.java

@@ -526,6 +526,9 @@ public class DIL_IC extends AbstractLabeledComponent<String> {
 
   @EditableProperty(name = "Display Pin #s")
   public DisplayNumbers getDisplayNumbers() {
+    if (displayNumbers == null) {
+      displayNumbers = DisplayNumbers.NO;
+    }
     return displayNumbers;
   }
 
@@ -590,7 +593,8 @@ public class DIL_IC extends AbstractLabeledComponent<String> {
         return Integer.toString(2 * index);
       }
     }
-    return null;
+    
+    return Integer.toString(index);
   }
 
   public static enum PinCount {