fix mem leak on error handling

Change-Id: I40d8e371c46184aa701fa676246201a9d8f6e27d
Abort surface composition if hw surface is invalid

If an invalid display device is detected during surface composition
(e.g., a simulated secondary display is removed), abort the
composition.

Change-Id: Ia6afb2e287882d8ae0614eb25463d3f85b687adf
Merge pull request #12 from CyanogenMod/cm-10.1

Cm 10.1