Make default vertex program correctly track surface size.
diff --git a/libs/rs/rsProgramVertex.h b/libs/rs/rsProgramVertex.h
index 493668c..a97ba38 100644
--- a/libs/rs/rsProgramVertex.h
+++ b/libs/rs/rsProgramVertex.h
@@ -63,6 +63,7 @@
 
     void init(Context *rsc, int32_t w, int32_t h);
     void deinit(Context *rsc);
+    void updateSize(Context *rsc, int32_t w, int32_t h);
 
     ObjectBaseRef<ProgramVertex> mDefault;
     ObjectBaseRef<ProgramVertex> mLast;