fix an issue in SF where we could miss some updates

Change-Id: I7d350bc05d1596655baddff3deaebaba58c9bcc0
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index bf30608..39bbb2b 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -116,7 +116,7 @@
     uint32_t mCurrentTransform;
     uint32_t mCurrentScalingMode;
     bool mCurrentOpacity;
-    size_t mRefreshPending;
+    bool mRefreshPending;
     bool mFrameLatencyNeeded;
     int mFrameLatencyOffset;