SurfaceFlinger: fix a couple NULL fence checks

This change replaces checks for a NULL fence pointer with calls to
Fence::isValid.  There should no longer be NULL fences.

Change-Id: If17c9c132fcb1801531bf7588f8ba53476c57dad

1 files changed, 2 insertions, 2 deletions

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 1401154d3c..439acb52ae 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -526,7 +526,7 @@ void Layer::onPostComposition() {
         mFrameTracker.setDesiredPresentTime(desiredPresentTime);
 
         sp<Fence> frameReadyFence = mSurfaceFlingerConsumer->getCurrentFence();
-        if (frameReadyFence != NULL) {
+        if (frameReadyFence->isValid()) {
             mFrameTracker.setFrameReadyFence(frameReadyFence);
         } else {
             // There was no fence for this frame, so assume that it was ready
@@ -536,7 +536,7 @@ void Layer::onPostComposition() {
 
         const HWComposer& hwc = mFlinger->getHwComposer();
         sp<Fence> presentFence = hwc.getDisplayFence(HWC_DISPLAY_PRIMARY);
-        if (presentFence != NULL) {
+        if (presentFence->isValid()) {
             mFrameTracker.setActualPresentFence(presentFence);
         } else {
             // The HWC doesn't support present fences, so use the refresh