AntTypeDefintion#similarDefinition could be called in situations

where the loader for the class is not antclassloader
Obtained from: David Konecny


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276858 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -352,6 +352,9 @@ public class AntTypeDefinition {
         // is the same
         ClassLoader oldLoader = other.getClassLoader();
         ClassLoader newLoader = this.getClassLoader();
+        if (oldLoader == newLoader) {
+            return true;
+        }
         return
             newLoader != null
             && oldLoader != null