Fix bug 3367627 - spontaneous crash

Fix a little-traversed codepath that could cause some grief.

Change-Id: I75e6931c3208a0f18b40446f23a2fdd5a0065ce8

core/java/android/widget/AbsListView.java

@@ -1095,9 +1095,8 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
      */
     private boolean contentFits() {
         final int childCount = getChildCount();
-        if (childCount != mItemCount) {
-            return false;
-        }
+        if (childCount == 0) return true;
+        if (childCount != mItemCount) return false;
 
         return getChildAt(0).getTop() >= 0 && getChildAt(childCount - 1).getBottom() <= mBottom;
     }