am a2a0a98a: Merge "Fix NPE if there is no accelerometer." into gingerbread

Merge commit 'a2a0a98ac7ce53f282a9a4caac9d382a0eb01ef9' into gingerbread-plus-aosp

* commit 'a2a0a98ac7ce53f282a9a4caac9d382a0eb01ef9':
  Fix NPE if there is no accelerometer.