map halt(t) to exit(t) rather than assert(0). all test cases except gravity pass with pas2c now
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="centerCrop"
android:src="@drawable/background"/>
</merge>