Fix a compile warning in the Surface class.
Fix a compile warning in the Surface class.

Change-Id: Id744e71d2cd23c287925a5090e13a6d9908cdd99

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base