Fix the test of the unless condition

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1367459 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/Target.java

@@ -529,7 +529,7 @@ public class Target implements TaskContainer {
         public boolean eval() throws BuildException {
             PropertyHelper propertyHelper = PropertyHelper.getPropertyHelper(getProject());
             Object o = propertyHelper.parseProperties(condition);
-            return propertyHelper.testUnlessCondition(o);
+            return !propertyHelper.testUnlessCondition(o);
         }
 
     }