Fix for AIOBE at android.text.AndroidBidi.directions

This fixes bug 9900288: Multiple apps crashing; AIOBE at
android.text.AndroidBidi.directions.

The AndroidBidi.directions() method was not correctly handling the case
of a run of length 0, causing ArrayIndexOutOfBoundsException. This
patch simply avoids accessing the levels array in that case.

Change-Id: I036a85b7792ea3364725a87033ca74b94f0e93a1
1 file changed