Digish Pandya 1fa4cef34a hwui: fix possible null pointer de-refrence
add layer check for  null before de-refrencing it.

issue link: http://code.google.com/p/android/issues/detail?id=61622

Change-Id: I54fc21ec594effcfb1eededd80dd5b0b52645c4c
2014-06-13 17:14:50 +05:30
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