Fix a potential endless loop on android (FELIX-1631).

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@817968 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/framework/src/main/java/org/apache/felix/framework/ModuleImpl.java b/framework/src/main/java/org/apache/felix/framework/ModuleImpl.java
index 0d29839..787951a 100644
--- a/framework/src/main/java/org/apache/felix/framework/ModuleImpl.java
+++ b/framework/src/main/java/org/apache/felix/framework/ModuleImpl.java
@@ -1440,8 +1440,10 @@
                     // then delegate to the parent class loader; otherwise,
                     // break out of loop and return null.
                     boolean delegate = true;
-                    for (ClassLoader cl = classes[i].getClassLoader(); cl != null; cl = cl.getClass().getClassLoader())
+                    ClassLoader last = null;
+                    for (ClassLoader cl = classes[i].getClassLoader(); (cl != null) && (last != cl); cl = cl.getClass().getClassLoader())
                     {
+                        last = cl;
                         if (ModuleClassLoader.class.isInstance(cl))
                         {
                             delegate = false;