[TIMOB-4699] Android: xmlNodeListRange fails with NPE

E/KrollMethod( 1360): (kroll$1: app://app.js) [2,1487] Exception calling kroll method item, invocation: null ]
E/KrollMethod( 1360): java.lang.NullPointerException
E/KrollMethod( 1360): 	at ti.modules.titanium.xml.NodeProxy.getNodeProxy(NodeProxy.java:59)
E/KrollMethod( 1360): 	at ti.modules.titanium.xml.NodeListProxy.item(NodeListProxy.java:43)
E/KrollMethod( 1360): 	at ti.modules.titanium.xml.NodeListProxyBindingGen$2.invoke(NodeListProxyBindingGen.java:126)
E/KrollMethod( 1360): 	at org.appcelerator.kroll.KrollMethod.call(KrollMethod.java:51)
E/KrollMethod( 1360): 	at org.appcelerator.titanium.kroll.KrollCoverage$KrollFunctionCoverage.call(KrollCoverage.java:213)
E/KrollMethod( 1360): 	at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:1701)
E/KrollMethod( 1360): 	at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:854)
E/KrollMethod( 1360): 	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:164)
E/KrollMethod( 1360): 	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:426)
E/KrollMethod( 1360): 	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3177)
E/KrollMethod( 1360): 	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:162)
E/KrollMethod( 1360): 	at org.appcelerator.titanium.testharness.Test_harnessActivity$1.run(Test_harnessActivity.java:90)
E/KrollMethod( 1360): 	at org.appcelerator.titanium.TiMessageQueue.handleMessage(TiMessageQueue.java:219)
E/KrollMethod( 1360): 	at android.os.Handler.dispatchMessage(Handler.java:95)
E/KrollMethod( 1360): 	at android.os.Looper.loop(Looper.java:130)
E/KrollMethod( 1360): 	at org.appcelerator.titanium.kroll.KrollHandlerThread.run(KrollHandlerThread.java:86)
W/TiConvert( 1360): (kroll$1: app://app.js) [9,1596] Unsupported type class org.appcelerator.kroll.KrollProxy$1
D/dalvikvm( 1360): GC_CONCURRENT freed 1429K, 50% free 3958K/7815K, external 3125K/3903K, paused 3ms+3ms