minor clean-up. SurfaceFlinger doesn't need libpixelflinger.so.

Change-Id: I3bdca74351c8e480a05084bc412a96c5f685221d
diff --git a/libs/surfaceflinger_client/Surface.cpp b/libs/surfaceflinger_client/Surface.cpp
index 6d82b5d..aa0c2e8 100644
--- a/libs/surfaceflinger_client/Surface.cpp
+++ b/libs/surfaceflinger_client/Surface.cpp
@@ -384,7 +384,7 @@
 
 
 Mutex Surface::sCachedSurfacesLock;
-DefaultKeyedVector<wp<IBinder>, wp<Surface> > Surface::sCachedSurfaces(wp<Surface>(0));
+DefaultKeyedVector<wp<IBinder>, wp<Surface> > Surface::sCachedSurfaces;
 
 sp<Surface> Surface::readFromParcel(const Parcel& data) {
     Mutex::Autolock _l(sCachedSurfacesLock);
@@ -397,13 +397,13 @@
     if (surface->mSurface == 0) {
       surface = 0;
     }
-    cleanCachedSurfaces();
+    cleanCachedSurfacesLocked();
     return surface;
 }
 
 // Remove the stale entries from the surface cache.  This should only be called
 // with sCachedSurfacesLock held.
-void Surface::cleanCachedSurfaces() {
+void Surface::cleanCachedSurfacesLocked() {
     for (int i = sCachedSurfaces.size()-1; i >= 0; --i) {
         wp<Surface> s(sCachedSurfaces.valueAt(i));
         if (s == 0 || s.promote() == 0) {