change old picture serialization to really handle images

tools/LazyDecodeBitmap.cpp

Index: tools/LazyDecodeBitmap.cpp
diff --git a/tools/LazyDecodeBitmap.cpp b/tools/LazyDecodeBitmap.cpp
index 3b6f17e741195e8e6ab362a5e737f932db4748cf..6c655da9e97624775c12a8d807c06882439edd1b 100644
--- a/tools/LazyDecodeBitmap.cpp
+++ b/tools/LazyDecodeBitmap.cpp
@@ -40,5 +40,5 @@ bool sk_tools::LazyDecodeBitmap(const void* src, size_t length, SkBitmap* dst) {
         // Only meaningful if platform has a default discardable
         // memory implementation that differs from the global DM pool.
     }
-    return SkInstallDiscardablePixelRef(gen.detach(), dst, pool);
+    return SkInstallDiscardablePixelRef(gen.detach(), NULL, dst, pool);
 }