[TIMOB-14216] Android: setDisplayHomeAsUp doesn't work on a window with the navBarHidden property set to true

05-21 15:36:54.035: E/TiApplication(21464): (main) [163,163] Sending event: exception on thread: main msg:java.lang.NullPointerException; Titanium 3.1.0,2013/04/15 18:46,57634ef
05-21 15:36:54.035: E/TiApplication(21464): java.lang.NullPointerException
05-21 15:36:54.035: E/TiApplication(21464): 	at org.appcelerator.titanium.proxy.ActionBarProxy.handlesetDisplayHomeAsUp(ActionBarProxy.java:178)
05-21 15:36:54.035: E/TiApplication(21464): 	at org.appcelerator.titanium.proxy.ActionBarProxy.handleMessage(ActionBarProxy.java:201)
05-21 15:36:54.035: E/TiApplication(21464): 	at android.os.Handler.dispatchMessage(Handler.java:95)
05-21 15:36:54.035: E/TiApplication(21464): 	at android.os.Looper.loop(Looper.java:137)
05-21 15:36:54.035: E/TiApplication(21464): 	at android.app.ActivityThread.main(ActivityThread.java:4507)
05-21 15:36:54.035: E/TiApplication(21464): 	at java.lang.reflect.Method.invokeNative(Native Method)
05-21 15:36:54.035: E/TiApplication(21464): 	at java.lang.reflect.Method.invoke(Method.java:511)
05-21 15:36:54.035: E/TiApplication(21464): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
05-21 15:36:54.035: E/TiApplication(21464): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
05-21 15:36:54.035: E/TiApplication(21464): 	at dalvik.system.NativeStart.main(Native Method)
05-21 15:36:54.045: E/AndroidRuntime(21464): FATAL EXCEPTION: main

function openNewWindow() {
	var newWin = Ti.UI.createWindow({navBarHidden: true, backgroundColor: '#0F0'});

	newWin.addEventListener("open", function() {
		var newActionBar = this.activity.actionBar;
		if (newActionBar) {
			newActionBar.setDisplayHomeAsUp(true);
		}
	});

	newWin.open();
}

(function() {
	var win = Ti.UI.createWindow({backgroundColor: '#F00'});
	win.addEventListener("open", openNewWindow);

	win.open();
})();

<?xml version="1.0" encoding="UTF-8"?>
<ti:app xmlns:ti="http://ti.appcelerator.org">
    <id>com.tab.test</id>
    <name>TabTest</name>
    <version>1.0</version>
    <publisher>johndoe</publisher>
    <url>http://</url>
    <description>not specified</description>
    <copyright>not specified</copyright>
    <icon>appicon.png</icon>
    <persistent-wifi>false</persistent-wifi>
    <prerendered-icon>false</prerendered-icon>
    <statusbar-style>default</statusbar-style>
    <statusbar-hidden>false</statusbar-hidden>
    <fullscreen>false</fullscreen>
    <navbar-hidden>false</navbar-hidden>
    <analytics>false</analytics>
    <guid>e96a483e-41b2-4212-b78a-910612e01548</guid>
    <property name="ti.ui.defaultunit" type="string">system</property>
    <iphone>
        <orientations device="iphone">
            <orientation>Ti.UI.PORTRAIT</orientation>
        </orientations>
        <orientations device="ipad">
            <orientation>Ti.UI.PORTRAIT</orientation>
            <orientation>Ti.UI.UPSIDE_PORTRAIT</orientation>
            <orientation>Ti.UI.LANDSCAPE_LEFT</orientation>
            <orientation>Ti.UI.LANDSCAPE_RIGHT</orientation>
        </orientations>
    </iphone>
    <android xmlns:android="http://schemas.android.com/apk/res/android">
        <tool-api-level>17</tool-api-level>
        <manifest>
            <uses-sdk android:minSdkVersion="8"/>
            <!-- TI_MANIFEST -->
            <application android:debuggable="false"
                android:icon="@drawable/appicon" android:label="TabTest"
                android:name="TabtestApplication" android:theme="@android:style/Theme.Holo.Light">
                <!-- TI_APPLICATION -->
                <activity
                    android:configChanges="keyboardHidden|orientation"
                    android:label="TabTest" android:name=".TabtestActivity">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN"/>
                        <category android:name="android.intent.category.LAUNCHER"/>
                    </intent-filter>
                </activity>
                <activity
                    android:configChanges="keyboardHidden|orientation" android:name="org.appcelerator.titanium.TiActivity"/>
                <activity
                    android:configChanges="keyboardHidden|orientation"
                    android:name="org.appcelerator.titanium.TiTranslucentActivity" android:theme="@android:style/Theme.Translucent"/>
                <activity
                    android:configChanges="keyboardHidden|orientation"
                    android:name="org.appcelerator.titanium.TiModalActivity" android:theme="@android:style/Theme.Translucent"/>
                <activity
                    android:configChanges="keyboardHidden|orientation" android:name="ti.modules.titanium.ui.TiTabActivity"/>
            </application>
        </manifest>
    </android>
    <modules/>
    <deployment-targets>
        <target device="blackberry">false</target>
        <target device="android">true</target>
        <target device="ipad">false</target>
        <target device="iphone">false</target>
        <target device="mobileweb">false</target>
    </deployment-targets>
    <sdk-version>3.1.0.GA</sdk-version>
</ti:app>

	var newWin = Ti.UI.createWindow({navBarHidden: false, backgroundColor: '#0F0'});

	var newWin = Ti.UI.createWindow({navBarHidden: true, backgroundColor: '#0F0'});