More poweraction parsing work.

src/engine/wpak/PowerActionParser.java

@@ -225,6 +225,8 @@ public class PowerActionParser {
                     case "LEVELCAP":
                         arguments = lineValues[1].trim().split("\\s+");
                         powerActionEntry.levelCap = Integer.parseInt(arguments[0]);
+
+                        if (arguments.length > 1)  // Not all level caps have a curve
                             powerActionEntry.levelCurve = mbEnums.CompoundCurveType.valueOf(arguments[1]);
                         break;
                     case "CLEARAGGRO":