Fix the build

Bug: n/a
Test: compile
Change-Id: I39179d83ae748434dcfd2043143e7154053071d7
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e849313..1bc689d 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -705,6 +705,7 @@
 
     mat4 mPreviousColorMatrix;
     mat4 mColorMatrix;
+    bool mHasColorMatrix;
 
     // Static screen stats
     bool mHasPoweredOff;