Fix reversed ?: consequences; avoid NPE.

PR: 36094
Obtained from: Dave Brosius


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@278509 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/Resource.java

@@ -294,7 +294,7 @@ public class Resource extends DataType
             return getCheckedRef().hashCode();
         }
         String name = getName();
-        return MAGIC * (name == null ? name.hashCode() : NULL_NAME);
+        return MAGIC * (name == null ? NULL_NAME : name.hashCode());
     }
 
     /**