Naomi Luis c17c053935 libhwcomposer: Disable alpha if layer blending is disabled
If the layer blending has been disabled, disable copybit alpha so
that copybit does not perform any blend operation.

Change-Id: I9a83fad0f126adaf9540bc72d17e7dcb1c55cd0f
CRs-fixed: 288527
2011-09-19 19:16:36 -05:00
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