Fix bug where dirty messages for allocations attached to programVertex objects could be lost.
diff --git a/libs/rs/rsProgram.h b/libs/rs/rsProgram.h
index 26b78dd..57c654f 100644
--- a/libs/rs/rsProgram.h
+++ b/libs/rs/rsProgram.h
@@ -44,6 +44,10 @@
     ObjectBaseRef<Allocation> mConstants;
 
     mutable bool mDirty;
+
+
+public:
+    void forceDirty() {mDirty = true;}
 };