Condition fix

src/engine/wpak/PowersParser.java

@@ -289,12 +289,14 @@ public class PowersParser {
 
             // Parse power conditions
 
+            if (conditionString.toString().isEmpty() == false) {
                 String[] conditions = conditionString.toString().split("\n");
 
                 for (String condition : conditions) {
                     String[] parameters = condition.trim().split("\\s+");
                     powerEntry.conditions.put(parameters[0], Float.parseFloat(parameters[1]));
                 }
+            }
 
         } catch (Exception e) {
             Logger.error(powerEntry.power_id + " " + e);